Early Muslim Conquests
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The early Muslim conquests or early Islamic conquests (), also known as the Arab conquests, were initiated in the 7th century by
Muhammad Muhammad (8 June 632 CE) was an Arab religious and political leader and the founder of Islam. Muhammad in Islam, According to Islam, he was a prophet who was divinely inspired to preach and confirm the tawhid, monotheistic teachings of A ...
, the founder of
Islam Islam is an Abrahamic religions, Abrahamic monotheistic religion based on the Quran, and the teachings of Muhammad. Adherents of Islam are called Muslims, who are estimated to number Islam by country, 2 billion worldwide and are the world ...
. He established the
first Islamic state The first Islamic state was established by the Islamic prophet Muhammad in Medina in 622 under the Constitution of Medina. It represented the political unity of the Muslim ''Ummah'' (nation). After Muhammad's death, his companions known as the R ...
in
Medina Medina, officially al-Madinah al-Munawwarah (, ), also known as Taybah () and known in pre-Islamic times as Yathrib (), is the capital of Medina Province (Saudi Arabia), Medina Province in the Hejaz region of western Kingdom of Saudi Arabia, ...
,
Arabia The Arabian Peninsula (, , or , , ) or Arabia, is a peninsula in West Asia, situated north-east of Africa on the Arabian plate. At , comparable in size to India, the Arabian Peninsula is the largest peninsula in the world. Geographically, the ...
that expanded rapidly under the
Rashidun Caliphate The Rashidun Caliphate () is a title given for the reigns of first caliphs (lit. "successors") — Abu Bakr, Umar, Uthman, and Ali collectively — believed to Political aspects of Islam, represent the perfect Islam and governance who led the ...
and the
Umayyad Caliphate The Umayyad Caliphate or Umayyad Empire (, ; ) was the second caliphate established after the death of the Islamic prophet Muhammad and was ruled by the Umayyad dynasty. Uthman ibn Affan, the third of the Rashidun caliphs, was also a member o ...
, culminating in Muslim rule being established on three continents (
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,
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, and
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) over the next century. According to historian James Buchan: "In speed and extent, the first Arab conquests were matched only by those of
Alexander the Great Alexander III of Macedon (; 20/21 July 356 BC – 10/11 June 323 BC), most commonly known as Alexander the Great, was a king of the Ancient Greece, ancient Greek kingdom of Macedonia (ancient kingdom), Macedon. He succeeded his father Philip ...
, and they were more lasting." At their height, the territory that was conquered by the
Arab Muslims Arab Muslims () are the Arabs who adhere to Islam. They are the largest subdivision of the Arab people and the largest ethnic group among Muslims globally, followed by Bengalis and Punjabis. Likewise, they comprise the majority of the population ...
stretched from
Iberia The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, compri ...
(at the
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) in the west to
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
(at Sind) in the east; Muslim control spanned
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, most of the
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, and the
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and
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. Among other drastic changes, the early Muslim conquests brought about the collapse of the
Sasanian Empire The Sasanian Empire (), officially Eranshahr ( , "Empire of the Iranian peoples, Iranians"), was an List of monarchs of Iran, Iranian empire that was founded and ruled by the House of Sasan from 224 to 651. Enduring for over four centuries, th ...
and great territorial losses for the
Byzantine Empire The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...
. Explanations for the Muslim victories have been difficult to discover, primarily because only fragmentary sources have survived from the period. American scholar Fred McGraw Donner suggests that Muhammad's establishment of an
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in Arabia coupled with ideological (i.e., religious) coherence and mobilization constituted the main factor that propelled the early Muslim armies to successfully establish, in the timespan of roughly a century, one of the largest empires in history. Estimates of the total area of the combined territory held by the early Muslim polities at the conquests' peak have been as high as . Most historians also agree that, as another primary factor determining the early Muslim conquests' success, the Sasanians and the Byzantines were militarily and economically exhausted from decades of warfare against each other. It has been suggested that
Jews Jews (, , ), or the Jewish people, are an ethnoreligious group and nation, originating from the Israelites of History of ancient Israel and Judah, ancient Israel and Judah. They also traditionally adhere to Judaism. Jewish ethnicity, rel ...
and some
Christians A Christian () is a person who follows or adheres to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. Christians form the largest religious community in the world. The words '' Christ'' and ''C ...
in Sasanian and Byzantine territory were dissatisfied and welcomed the invading Muslim troops, largely because of religious conflict in both empires. However, confederations of Arab Christians, including the
Ghassanids The Ghassanids, also known as the Jafnids, were an Tribes of Arabia, Arab tribe. Originally from South Arabia, they migrated to the Levant in the 3rd century and established what would eventually become a Christian state, Christian kingdom unde ...
, initially allied themselves with the Byzantines. There were also instances of alliances between the Sasanians and the Byzantines, such as when they fought together against the
Rashidun army The Rashidun army () was the core of the Rashidun Caliphate's armed forces during the early Muslim conquests in the 7th century. The army is reported to have maintained a high level of discipline, strategic prowess and organization, grantin ...
during the Battle of Firaz. Some of the lands lost by the Byzantines to the Muslims (namely
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,
Palestine Palestine, officially the State of Palestine, is a country in West Asia. Recognized by International recognition of Palestine, 147 of the UN's 193 member states, it encompasses the Israeli-occupied West Bank, including East Jerusalem, and th ...
, and
Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
) had been reclaimed from the Sasanians only a few years prior to the Muslim conquests.


Background


Pre-Islamic Arabia

Arabia was a region that hosted several cultures, some urban and others nomadic
Bedouin The Bedouin, Beduin, or Bedu ( ; , singular ) are pastorally nomadic Arab tribes who have historically inhabited the desert regions in the Arabian Peninsula, North Africa, the Levant, and Mesopotamia (Iraq). The Bedouin originated in the Sy ...
. Arabian society was divided along tribal and clan lines, with the most important divisions being between the "southern" and "northern" tribal associations. Both the Byzantine and Sasanian empires competed for influence in Arabia by sponsoring clients; in turn, Arabian tribes sought the patronage of the two rival empires to bolster their own ambitions. The
Lakhmid kingdom The Lakhmid kingdom ( ), also referred to as al-Manādhirah () or as Banū Lakhm (), was an Arab kingdom that was founded and ruled by the Lakhmid dynasty from to 602. Spanning Eastern Arabia and Southern Mesopotamia, it existed as a depende ...
, which covered parts of what is now southern Iraq and northern Saudi Arabia was a client of Persia, and in 602 the Persians deposed the Lakhmids to take over the defense of the southern frontier. This left the Persians exposed and overextended, helping to set the stage for the collapse of the Persian Empire later that century. Southern Arabia—especially what is now—Yemen, had for thousands of years been a wealthy region that had been a center of the
spice trade The spice trade involved historical civilizations in Asia, Northeast Africa and Europe. Spices, such as cinnamon, cassia, cardamom, ginger, pepper, nutmeg, star anise, clove, and turmeric, were known and used in antiquity and traded in t ...
. Yemen had been at the center of an international trading network linking Eurasia to Africa, and Yemen. It had been visited by merchants from East Africa, Europe, the Middle East, India and even from as far away as China. In turn, the Yemeni were skilled sailors, travelling up the
Red Sea The Red Sea is a sea inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb Strait and the Gulf of Aden. To its north lie the Sinai Peninsula, the Gulf of Aqaba, and th ...
to Egypt and across the Indian Ocean to India and down the east African coast. Inland, the valleys of Yemen had been cultivated by a system of irrigation that had been set back when the Marib Dam was destroyed by an earthquake in about 450 AD.
Frankincense Frankincense, also known as olibanum (), is an Aroma compound, aromatic resin used in incense and perfumes, obtained from trees of the genus ''Boswellia'' in the family (biology), family Burseraceae. The word is from Old French ('high-quality in ...
and
myrrh Myrrh (; from an unidentified ancient Semitic language, see '' § Etymology'') is a gum-resin extracted from a few small, thorny tree species of the '' Commiphora'' genus, belonging to the Burseraceae family. Myrrh resin has been used ...
had been greatly valued in the Mediterranean region, being used in religious ceremonies. However, the conversion of the Mediterranean world to Christianity had significantly reduced the demand for these commodities, causing a major economic slump in southern Arabia which helped to create the impression that Arabia was a backward region. Little is known of the pre-Islamic religions of Arabia, but it is known that the Arabs worshipped gods such as al-Lāt, Manat, al-Uzza, and Hubal, with the supreme deity in their pantheon being Allah (God). There were also Jewish and Christian communities in Arabia, particularly in regions like
Yemen Yemen, officially the Republic of Yemen, is a country in West Asia. Located in South Arabia, southern Arabia, it borders Saudi Arabia to Saudi Arabia–Yemen border, the north, Oman to Oman–Yemen border, the northeast, the south-eastern part ...
and
Najran Najran ( '), is a city in southwestern Saudi Arabia. It is the capital of Najran Province. Today, the city of Najran is one of the fastest-growing cities in the kingdom of Saudi Arabia. As of the 2022 census, the city population was 381,431, wi ...
, and aspects of Arab culture and religious practices reflected their influence. Arabian society during this time was primarily tribal, with strong kinship ties and a code of honor known as ''murūwah'', which emphasized bravery, loyalty, and hospitality. Pilgrimage was a significant part of Arabian religious life, and one of the most important pilgrimage sites was
Mecca Mecca, officially Makkah al-Mukarramah, is the capital of Mecca Province in the Hejaz region of western Saudi Arabia; it is the Holiest sites in Islam, holiest city in Islam. It is inland from Jeddah on the Red Sea, in a narrow valley above ...
, which housed the
Kaaba The Kaaba (), also spelled Kaba, Kabah or Kabah, sometimes referred to as al-Kaba al-Musharrafa (), is a stone building at the center of Islam's most important mosque and Holiest sites in Islam, holiest site, the Masjid al-Haram in Mecca, Sa ...
, considered a sacred sanctuary. The Kaʿbah was a central site of worship and was surrounded by 360 idols representing various deities. The region also had an annual fair and market called Ukāẓ, where tribes gathered for trade, poetry competitions, and diplomacy. Poetry was a vital cultural element, with poets serving as both entertainers and historians, preserving the oral traditions of their tribes. The Arabian Peninsula served as a hub for trade routes connecting the
Roman Empire The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Roman people, Romans conquered most of this during the Roman Republic, Republic, and it was ruled by emperors following Octavian's assumption of ...
,
Persian Empire The Achaemenid Empire or Achaemenian Empire, also known as the Persian Empire or First Persian Empire (; , , ), was an Iranian empire founded by Cyrus the Great of the Achaemenid dynasty in 550 BC. Based in modern-day Iran, it was the larg ...
,
Byzantine Empire The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...
, and
Indian subcontinent The Indian subcontinent is a physiographic region of Asia below the Himalayas which projects into the Indian Ocean between the Bay of Bengal to the east and the Arabian Sea to the west. It is now divided between Bangladesh, India, and Pakista ...
. The cities of
Mecca Mecca, officially Makkah al-Mukarramah, is the capital of Mecca Province in the Hejaz region of western Saudi Arabia; it is the Holiest sites in Islam, holiest city in Islam. It is inland from Jeddah on the Red Sea, in a narrow valley above ...
and
Medina Medina, officially al-Madinah al-Munawwarah (, ), also known as Taybah () and known in pre-Islamic times as Yathrib (), is the capital of Medina Province (Saudi Arabia), Medina Province in the Hejaz region of western Kingdom of Saudi Arabia, ...
—then known as Yathrib—prospered due to their strategic location along these trade routes. Mecca, in particular, was an important commercial center and a place of truce where violence was prohibited, especially during the pilgrimage season. According to Islamic tradition, Muhammad, a merchant from Mecca, began receiving revelations through the archangel
Gabriel In the Abrahamic religions (Judaism, Christianity, Islam), Gabriel ( ) is an archangel with the power to announce God's will to mankind, as the messenger of God. He is mentioned in the Hebrew Bible, the New Testament and the Quran. Many Chris ...
, in which he was told that he was the last of the prophets, completing the message of monotheism brought by prophets such as
Abraham Abraham (originally Abram) is the common Hebrews, Hebrew Patriarchs (Bible), patriarch of the Abrahamic religions, including Judaism, Christianity, and Islam. In Judaism, he is the founding father who began the Covenant (biblical), covenanta ...
,
Moses In Abrahamic religions, Moses was the Hebrews, Hebrew prophet who led the Israelites out of slavery in the The Exodus, Exodus from ancient Egypt, Egypt. He is considered the most important Prophets in Judaism, prophet in Judaism and Samaritani ...
, and
Jesus Jesus (AD 30 or 33), also referred to as Jesus Christ, Jesus of Nazareth, and many Names and titles of Jesus in the New Testament, other names and titles, was a 1st-century Jewish preacher and religious leader. He is the Jesus in Chris ...
(known as Isa in Islam). His teachings emphasized the worship of one God (Allah) and social justice, which brought him into conflict with the elite of Mecca, who opposed his message. After facing persecution, Muhammad and his followers migrated to the city of Yathrib, which became known as
Medina Medina, officially al-Madinah al-Munawwarah (, ), also known as Taybah () and known in pre-Islamic times as Yathrib (), is the capital of Medina Province (Saudi Arabia), Medina Province in the Hejaz region of western Kingdom of Saudi Arabia, ...
("City of Light, or the Luminous City"). In Medina, Muhammad established the
first Islamic state The first Islamic state was established by the Islamic prophet Muhammad in Medina in 622 under the Constitution of Medina. It represented the political unity of the Muslim ''Ummah'' (nation). After Muhammad's death, his companions known as the R ...
based on faith, law, and mutual support. By 630 CE, Muhammad and his followers returned to Mecca and peacefully took control of the city, cleansing the Kaaba of its idols and dedicating it solely to the worship of Allah.


Byzantine–Sasanian Wars

The prolonged and escalating Byzantine–Sasanian wars of the 6th and 7th centuries and the recurring outbreaks of bubonic plague (
Plague of Justinian The plague of Justinian or Justinianic plague (AD 541–549) was an epidemic of Plague (disease), plague that afflicted the entire Mediterranean basin, Mediterranean Basin, Europe, and the Near East, especially the Sasanian Empire and the Byza ...
) left both empires exhausted and weakened in the face of the sudden emergence and expansion of the Arabs. The last of these wars ended with victory for the Byzantines: Emperor
Heraclius Heraclius (; 11 February 641) was Byzantine emperor from 610 to 641. His rise to power began in 608, when he and his father, Heraclius the Elder, the Exarch of Africa, led a revolt against the unpopular emperor Phocas. Heraclius's reign was ...
regained all lost territories and restored the
True Cross According to Christian tradition, the True Cross is the real instrument of Jesus' crucifixion, cross on which Jesus of Nazareth was Crucifixion of Jesus, crucified. It is related by numerous historical accounts and Christian mythology, legends ...
to
Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...
in 629. The war against
Zoroastrian Zoroastrianism ( ), also called Mazdayasnā () or Beh-dīn (), is an Iranian religion centred on the Avesta and the teachings of Zarathushtra Spitama, who is more commonly referred to by the Greek translation, Zoroaster ( ). Among the wo ...
Persia, whose people worshiped the fire god
Ahura Mazda Ahura Mazda (; ; or , ),The former is the New Persian rendering of the Avestan form, while the latter derives from Middle Persian. also known as Horomazes (),, is the only creator deity and Sky deity, god of the sky in the ancient Iranian ...
, had been portrayed by Heraclius as a holy war in defense of the Christian faith and the Wood of the Holy Cross, as splinters of wood said to be from the True Cross were known, had been used to inspire Christian fighting zeal. The idea of a holy war against the "fire worshipers", as the Christians called the Zoroastrians, had aroused much enthusiasm, leading to an all-out effort to defeat the Persians. Nevertheless, neither empire was given any chance to recover, as within a few years they were overrun by the advances of the
Arabs Arabs (,  , ; , , ) are an ethnic group mainly inhabiting the Arab world in West Asia and North Africa. A significant Arab diaspora is present in various parts of the world. Arabs have been in the Fertile Crescent for thousands of yea ...
(newly united by Islam), which, according to James Howard-Johnston, "can only be likened to a human tsunami". According to George Liska, the "unnecessarily prolonged Byzantine–Persian conflict opened the way for Islam".


Arab invasion

In late 620s Muhammad had already managed to conquer and unify much of Arabia under Muslim rule, and it was under his leadership that the first Muslim-Byzantine skirmishes took place in response to Byzantine incursions. Just a few months after Heraclius and the Persian general
Shahrbaraz Shahrbaraz (also spelled Shahrvaraz or Shahrwaraz; New Persian: ) was shah (king) of the Sasanian Empire from 27 April 630 to 9 June 630. He usurped the throne from Ardashir III, and was killed by Iranian nobles after forty days. Before usurp ...
agreed on terms for the withdrawal of Persian troops from occupied Byzantine eastern provinces in 629, Arab and Byzantine troops confronted each other at the
Battle of Mu'tah The Battle of Mu'tah (, or ') took place in September 629 (1 Jumada al-Awwal 8 AH), between the forces of Muhammad and the army of the Byzantine Empire and their Ghassanid vassals. It took place in the village of Mu'tah in Palaestina Sa ...
as a result of Byzantine vassals murdering a Muslim emissary. Muhammad died in 632 and was succeeded by
Abu Bakr Abd Allah ibn Abi Quhafa (23 August 634), better known by his ''Kunya (Arabic), kunya'' Abu Bakr, was a senior Sahaba, companion, the closest friend, and father-in-law of Muhammad. He served as the first caliph of the Rashidun Caliphate, ruli ...
, the first
caliph A caliphate ( ) is an institution or public office under the leadership of an Islamic steward with Khalifa, the title of caliph (; , ), a person considered a political–religious successor to the Islamic prophet Muhammad and a leader of ...
with undisputed control of the entire Arab peninsula after the successful
Ridda Wars The Ridda Wars were a series of military campaigns launched by the first caliph Abu Bakr against rebellious Arabian tribes, some of which were led by rival prophet claimants. They began shortly after the death of the Islamic prophet Muhammad in ...
, which resulted in the consolidation of a powerful Muslim state throughout the peninsula. Byzantine sources, such as ''Short History'' written by Nikephoros, claim that the Arab invasion came about as a result of restrictions imposed on Arab traders curtailing their ability to trade within Byzantine territory, and to send the profits of their trade out of Byzantine territory. As a result, the Arabs murdered a Byzantine official named Sergius whom they held responsible for convincing the Emperor Heraclius to impose the trade restrictions. Nikephoros relates that:
The Saracens, having flayed a camel, enclosed him in the hide and sewed it up. As the skin hardened, the man who was left inside also withered and so perished in a painful manner. The charge against him was that he had persuaded Heraclius not to allow the Saracens to trade from the Byzantine country and send out of the Byzantine state the thirty pounds of gold which they normally received by way of commercial gain; and for this reason they began to lay waste the Byzantine land.
Some scholars assert that this is the same Sergius, called "the Candidatus", who was "killed by the Saracens" as related in the 7th century ''Doctrina Jacobi'' document.


Armies


Arab

In Arabia, swords from India were greatly esteemed as being made of the finest steel and were the favorite weapons of the ''
Mujahideen ''Mujahideen'', or ''Mujahidin'' (), is the plural form of ''mujahid'' (), an Arabic term that broadly refers to people who engage in ''jihad'' (), interpreted in a jurisprudence of Islam as the fight on behalf of God, religion or the commun ...
''. The Arab sword known as the ' closely resembled the Byzantine ''
gladius ''Gladius'' () is a Latin word properly referring to the type of sword that was used by Ancient Rome, ancient Roman foot soldiers starting from the 3rd century BC and until the 3rd century AD. Linguistically, within Latin, the word also came t ...
''. Swords and spears were the major weapons of the Muslims, and armour was either mail or leather. In northern Arabia, Byzantine influence predominated; in eastern Arabia, Persian influence predominated; and in Yemen, Indian influence was felt. As the caliphate spread, the Muslims were influenced by the peoples they conquered—the
Turkic peoples Turkic peoples are a collection of diverse ethnic groups of West Asia, West, Central Asia, Central, East Asia, East, and North Asia as well as parts of Europe, who speak Turkic languages.. "Turkic peoples, any of various peoples whose members ...
in Central Asia, the
Persians Persians ( ), or the Persian people (), are an Iranian ethnic group from West Asia that came from an earlier group called the Proto-Iranians, which likely split from the Indo-Iranians in 1800 BCE from either Afghanistan or Central Asia. They ...
, and the Byzantines in Syria. The Bedouin tribes of Arabia favored archery, though contrary to popular belief Bedouin archers usually fought on foot instead of horseback. The Arabs usually fought defensive battles with their archers placed on both flanks. By the Umayyad period, the caliphate had a standing army, including the elite ''Ahl al-Sham'' ("people of Syria"), raised from the Arabs who settled in Syria. The caliphate was divided into ''jund'', or regional armies, stationed in the provinces being made of mostly Arab tribes who were paid monthly by the ''Diwan al-Jaysh'' (War Ministry).


Byzantine

The infantry of the
Byzantine army The Byzantine army was the primary military body of the Byzantine Empire, Byzantine armed forces, serving alongside the Byzantine navy. A direct continuation of the East Roman army, Eastern Roman army, shaping and developing itself on the legac ...
continued to be recruited from within the Byzantine Empire, but much of the cavalry were either recruited from "martial" peoples in the Balkans or in Asia Minor or alternatively were Germanic mercenaries. Most of the Byzantine troops in Syria were ''indigenae'' (local), and it seems that at the time of the Muslim conquest, the Byzantine forces in Syria were Arabs. In response to the loss of Syria, the Byzantines developed the ''phylarch'' system of using Armenian and Arab Christian auxiliaries living on the frontier to provide a "shield" to counter raiding by the Muslims into the empire. Overall, the Byzantine army remained a small but professional force of ''foederati''. Unlike the ''foederati'' who were sent where they were needed, the ''stradioti'' lived in the frontier provinces.


Persian

During the last decades of the Sasanian empire, the frequent use of royal titles by Persian governors in Central Asia, especially in what is now Afghanistan, indicates a weakening of the power of the ''Shahinshah'' (King of Kings), suggesting the empire was already breaking down at the time of the Muslim conquest. Persian society was rigidly divided into castes with the nobility being of supposed "Aryan" descent, and this division of Persian society along caste lines was reflected in the military. The '' azatan'' aristocracy provided the cavalry, the '' paighan'' infantry came from the peasantry and most of the greater Persian nobility had slave soldiers, this last being based on the Persian example. Much of the Persian army consisted of tribal mercenaries recruited from the plains south of the Caspian Sea and from what is now Afghanistan. The Persian tactics were cavalry based with the Persian forces usually divided into a center, based upon a hill, and two wings of cavalry on either side.


Ethiopian

Little is known about the military forces of the Christian state of Ethiopia other than that they were divided into ' professional troops and the ' auxiliaries. The Ethiopians made much use of camels and elephants.


Berber

The
Berber Berber or Berbers may refer to: Ethnic group * Berbers, an ethnic group native to Northern Africa * Berber languages, a family of Afro-Asiatic languages Places * Berber, Sudan, a town on the Nile People with the surname * Ady Berber (1913–196 ...
peoples of North Africa had often served as a ' (auxiliaries) to the Byzantine Army. The Berber forces were based around the horse and camel but seemed to have been hampered by a lack of weapons or protection, with both Byzantine and Arab sources mentioning the Berbers lacked armour and helmets. The Berbers went to war with their entire communities, and the presence of women and children both slowed down the Berber armies and tied down Berber tribesmen who tried to protect their families.


Turkic

The British historian David Nicolle called the Turkic peoples of Central Asia the "most formidable foes" faced by the Muslims. The Jewish Turkic Khazar khanate, based in what is now southern Russia and Ukraine, had a powerful heavy cavalry. The Turkic heartland of Central Asia was divided into five khanates whose khans variously recognized the shahs of Iran or the emperors of China as their overlords. Turkic society was feudal with the khans only being ''pater primus'' among the aristocracy of ' who lived in castles in the countryside, with the rest of Turkic forces being divided into ' (farmers), ' (servants) and ' (clients). The heavily armored Turkic cavalry played a significant role in influencing subsequent Muslim tactics and weapons; the Turkic peoples, who were mostly Buddhists at the time of the Islamic conquest, later converted to Islam and came to be regarded as the foremost Muslim warriors, to the extent of replacing the Arabs as the dominant peoples in the '' Dar al-Islam'' (House of Islam).


Visigoth

During the
migration period The Migration Period ( 300 to 600 AD), also known as the Barbarian Invasions, was a period in European history marked by large-scale migrations that saw the fall of the Western Roman Empire and subsequent settlement of its former territories ...
, the Germanic
Visigoths The Visigoths (; ) were a Germanic people united under the rule of a king and living within the Roman Empire during late antiquity. The Visigoths first appeared in the Balkans, as a Roman-allied Barbarian kingdoms, barbarian military group unite ...
had traveled from their homeland north of the
Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...
to settle in the Roman province of
Hispania Hispania was the Ancient Rome, Roman name for the Iberian Peninsula. Under the Roman Republic, Hispania was divided into two Roman province, provinces: Hispania Citerior and Hispania Ulterior. During the Principate, Hispania Ulterior was divide ...
, creating a kingdom upon the wreckage of the
Western Roman Empire In modern historiography, the Western Roman Empire was the western provinces of the Roman Empire, collectively, during any period in which they were administered separately from the eastern provinces by a separate, independent imperial court. ...
. The Visigothic state in
Iberia The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, compri ...
was based around forces raised by the nobility whom the king could call out in the event of war. The king had his ' and ' loyal to himself, while the nobility had their '. The Visigoths favored cavalry with their favorite tactics being to repeatedly charge a foe combined with feigned retreats. The Muslim conquest of most of Iberia in less than a decade does suggest serious deficiencies with the Visigothic kingdom, though the limited sources make it difficult to discern the precise reasons for the collapse of the Visigoths.


Frankish

Another Germanic people who founded a state upon the ruins of the Western Roman Empire were the
Franks file:Frankish arms.JPG, Aristocratic Frankish burial items from the Merovingian dynasty The Franks ( or ; ; ) were originally a group of Germanic peoples who lived near the Rhine river, Rhine-river military border of Germania Inferior, which wa ...
who settled in
Gaul Gaul () was a region of Western Europe first clearly described by the Roman people, Romans, encompassing present-day France, Belgium, Luxembourg, and parts of Switzerland, the Netherlands, Germany, and Northern Italy. It covered an area of . Ac ...
. Like the Visigoths, the Frankish cavalry played a "significant part" in their wars. The Frankish kings expected all of their male subjects to perform three months of military service every year, and all serving under the king's banner were paid a regular salary. Those called up for service had to provide their own weapons and horses, which contributed to the "militarisation of Frankish society". At least part of the reason for the victories of
Charles Martel Charles Martel (; – 22 October 741), ''Martel'' being a sobriquet in Old French for "The Hammer", was a Franks, Frankish political and military leader who, as Duke and Prince of the Franks and Mayor of the Palace, was the de facto ruler of ...
was he could call up a force of experienced warriors when faced with Muslim raids.


Campaigns


Conquest of the Levant: 634–641

The province of Syria was the first to be wrested from Byzantine control. Arab-Muslim raids that followed the
Ridda Wars The Ridda Wars were a series of military campaigns launched by the first caliph Abu Bakr against rebellious Arabian tribes, some of which were led by rival prophet claimants. They began shortly after the death of the Islamic prophet Muhammad in ...
prompted the Byzantines to send a major expedition into southern
Palestine Palestine, officially the State of Palestine, is a country in West Asia. Recognized by International recognition of Palestine, 147 of the UN's 193 member states, it encompasses the Israeli-occupied West Bank, including East Jerusalem, and th ...
, which was defeated by the Arab forces under command of
Khalid ibn al-Walid Khalid ibn al-Walid ibn al-Mughira al-Makhzumi (; died 642) was a 7th-century Arabs, Arab military commander. He initially led campaigns against Muhammad on behalf of the Quraysh. He later became a Muslim and spent the remainder of his career ...
at the Battle of Ajnadayn in 634. Ibn al-Walid had converted to Islam around 627, becoming one of Muhammad's most successful generals. Ibn al-Walid had been fighting in Iraq against the Sasanians when he led his force on a trek across the deserts to Syria to attack the Byzantines from the rear. In the Battle of the Mud fought at or near Pella (Fahl) and nearby Scythopolis (Beisan), both in the Jordan Valley, in December 634 or January 635, the Arabs scored another victory. After a siege of six months the Arabs took Damascus, but Emperor Heraclius later retook it. At the battle of Yarmuk (636), the Arabs were victorious, defeating Heraclius. Ibn al-Walid appears to have been the "real military leader" at Yarmuk "under the nominal command of others". Syria was ordered to be abandoned to the Muslims with Heraclius reportedly saying: "Peace be with you Syria; what a beautiful land you will be for your enemy". On the heels of their victory, the Arab armies took
Damascus Damascus ( , ; ) is the capital and List of largest cities in the Levant region by population, largest city of Syria. It is the oldest capital in the world and, according to some, the fourth Holiest sites in Islam, holiest city in Islam. Kno ...
again in 636, with
Baalbek Baalbek (; ; ) is a city located east of the Litani River in Lebanon's Beqaa Valley, about northeast of Beirut. It is the capital of Baalbek-Hermel Governorate. In 1998, the city had a population of 82,608. Most of the population consists of S ...
,
Homs Homs ( ; ), known in pre-Islamic times as Emesa ( ; ), is a city in western Syria and the capital of the Homs Governorate. It is Metres above sea level, above sea level and is located north of Damascus. Located on the Orontes River, Homs is ...
, and
Hama Hama ( ', ) is a city on the banks of the Orontes River in west-central Syria. It is located north of Damascus and north of Homs. It is the provincial capital of the Hama Governorate. With a population of 996,000 (2023 census), Hama is one o ...
to follow soon afterwards. However, other fortified towns continued to resist despite the rout of the imperial army and had to be conquered individually.
Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...
fell in 638, Caesarea in 640, while others held out until 641. After a two-year siege, the garrison of Jerusalem surrendered rather than starve to death; under the terms of the surrender Caliph
Umar Umar ibn al-Khattab (; ), also spelled Omar, was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr () and is regarded as a senior companion and father-in-law of the Islamic prophet Mu ...
promised to tolerate the Christians of Jerusalem and not to turn churches into mosques. True to his word, Umar allowed the
Church of the Holy Sepulchre The Church of the Holy Sepulchre, also known as the Church of the Resurrection, is a fourth-century church in the Christian Quarter of the Old City of Jerusalem, Old City of Jerusalem. The church is the seat of the Greek Orthodox Patriarchat ...
to remain, with the caliph praying on a prayer rug outside of the church. The loss to the Muslims of Jerusalem, the holiest city to Christians, proved to be the source of much resentment in Christendom. The city of
Caesarea Maritima Caesarea () also Caesarea Maritima, Caesarea Palaestinae or Caesarea Stratonis, was an ancient and medieval port city on the coast of the eastern Mediterranean, and later a small fishing village. It was the capital of Judaea (Roman province), ...
continued to withstand the Muslim siege—as it could be supplied by sea—until it was taken by assault in 640. In the mountains of Asia Minor, the Muslims enjoyed less success, with the Byzantines adopting the tactic of "shadowing warfare" — refusing to give battle to the Muslims, while the people retreated into castles and fortified towns when the Muslims invaded; instead, Byzantine forces ambushed Muslim raiders as they returned to Syria carrying plunder and people they had enslaved. In the frontier area where
Anatolia Anatolia (), also known as Asia Minor, is a peninsula in West Asia that makes up the majority of the land area of Turkey. It is the westernmost protrusion of Asia and is geographically bounded by the Mediterranean Sea to the south, the Aegean ...
met Syria, the Byzantine state evacuated the entire population and laid waste to the countryside, creating a no man's land where any invading army would find no food. For decades afterwards, a guerrilla war was waged by Christians in the hilly countryside of north-western Syria supported by the Byzantines. At the same time, the Byzantines began a policy of launching raids via sea on the coast of the caliphate with the aim of forcing the Muslims to keep at least some of their forces to defend their coastlines, thus limiting the number of troops available for an invasion of Anatolia. Unlike Syria with its plains and deserts — which favored the offensive — the mountainous terrain of Anatolia favored the defensive, and for centuries afterwards the line between Christian and Muslim lands ran along the border between Anatolia and Syria.


Conquest of Egypt: 639–642

The Byzantine province of Egypt held strategic importance for its grain production, naval yards, and as a base for further conquests in Africa. The Muslim general
Amr ibn al-As Amr ibn al-As ibn Wa'il al-Sahmi (664) was an Arab commander and companion of Muhammad who led the Muslim conquest of Egypt and served as its governor in 640–646 and 658–664. The son of a wealthy Qurayshite, Amr embraced Islam in and was ...
began the conquest of the province on his own initiative in 639. The majority of the Byzantine forces in Egypt were locally raised Coptic forces, intended to serve more as a police force; since the vast majority of Egyptians lived in the Nile River valley, surrounded on both the eastern and western sides by desert, Egypt was felt to be a relatively secure province. In December 639, Amr entered the Sinai with a large force and took
Pelusium Pelusium (Ancient Egyptian: ; /, romanized: , or , romanized: ; ; ; ; ) was an important city in the eastern extremes of Egypt's Nile Delta, to the southeast of the modern Port Said. It became a Roman provincial capital and Metropolitan arc ...
, on the edge of the Nile River valley, and then defeated a Byzantine counter-attack at Bibays. Contrary to expectations, the Arabs did not head for
Alexandria Alexandria ( ; ) is the List of cities and towns in Egypt#Largest cities, second largest city in Egypt and the List of coastal settlements of the Mediterranean Sea, largest city on the Mediterranean coast. It lies at the western edge of the Nile ...
, the capital of Egypt, but instead for a major fortress known as
Babylon Babylon ( ) was an ancient city located on the lower Euphrates river in southern Mesopotamia, within modern-day Hillah, Iraq, about south of modern-day Baghdad. Babylon functioned as the main cultural and political centre of the Akkadian-s ...
located at what is now Cairo. Amr was planning to divide the Nile River valley in two. The Arab forces won a major victory at the Battle of Heliopolis in 640, but they found it difficult to advance further because major cities in the
Nile Delta The Nile Delta (, or simply , ) is the River delta, delta formed in Lower Egypt where the Nile River spreads out and drains into the Mediterranean Sea. It is one of the world's larger deltas—from Alexandria in the west to Port Said in the eas ...
were protected by water and because Amr lacked the
machinery A machine is a physical system that uses power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolec ...
to break down city fortifications. The Arabs laid siege to Babylon, and its starving garrison surrendered on 9 April 641. Nevertheless, the province was scarcely urbanized and the defenders lost hope of receiving reinforcements from
Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
when the emperor
Heraclius Heraclius (; 11 February 641) was Byzantine emperor from 610 to 641. His rise to power began in 608, when he and his father, Heraclius the Elder, the Exarch of Africa, led a revolt against the unpopular emperor Phocas. Heraclius's reign was ...
died in 641. Afterwards, the Arabs turned north into the Nile Delta and laid siege to Alexandria. The last major center to fall into Arab hands was Alexandria, which capitulated in September 642. According to Hugh Kennedy, "Of all the early Muslim conquests, that of Egypt was the swiftest and most complete. ..Seldom in history can so massive a political change have happened so swiftly and been so long lasting." In 644, the Arabs suffered a major defeat by the Caspian Sea when an invading Muslim army was almost wiped out by the cavalry of the Khazar Khanate, and, seeing a chance to take back Egypt, the Byzantines launched an amphibious attack which took back Alexandria for a short period of time. Though most of Egypt is desert, the Nile Delta has some of the most productive and fertile farmland in the entire world, which had made Egypt the "granary" of the Byzantine empire. Control of Egypt meant that the caliphate could weather droughts without the fear of famine, laying the basis for the future prosperity of the caliphate.


Arab–Byzantine naval warfare

The Byzantine Empire had traditionally dominated the Mediterranean and the Black Sea with major naval bases at
Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
,
Acre The acre ( ) is a Unit of measurement, unit of land area used in the Imperial units, British imperial and the United States customary units#Area, United States customary systems. It is traditionally defined as the area of one Chain (unit), ch ...
, Alexandria and
Carthage Carthage was an ancient city in Northern Africa, on the eastern side of the Lake of Tunis in what is now Tunisia. Carthage was one of the most important trading hubs of the Ancient Mediterranean and one of the most affluent cities of the classic ...
. In 652, the Arabs won their first victory at sea off Alexandria, which was followed by the temporary Muslim conquest of
Cyprus Cyprus (), officially the Republic of Cyprus, is an island country in the eastern Mediterranean Sea. Situated in West Asia, its cultural identity and geopolitical orientation are overwhelmingly Southeast European. Cyprus is the List of isl ...
. As Yemen had been a center of maritime trade, Yemeni sailors were brought to Alexandria to start building an Islamic fleet for the Mediterranean. The Muslim fleet was based in Alexandria and used Acre, Tyre and
Beirut Beirut ( ; ) is the Capital city, capital and largest city of Lebanon. , Greater Beirut has a population of 2.5 million, just under half of Lebanon's population, which makes it the List of largest cities in the Levant region by populatio ...
as its forward bases. The core of the fleet's sailors were Yemeni, but the shipwrights who built the ships were Iranian and Iraqi. In the Battle of the Masts off Cape Chelidonia in Anatolia in 655, the Muslims defeated the Byzantine fleet in a series of boarding actions. As a result, the Byzantines began a major expansion of their navy, which was matched by the Arabs, leading to a naval arms race. From the early 8th century onward, the Muslim fleet would launch annual raids on the coastline on the Byzantine empire in Anatolia and Greece. As part of the arms race, both sides sought new technology to improve their warships. The Muslim warships had a larger
forecastle The forecastle ( ; contracted as fo'c'sle or fo'c's'le) is the upper deck (ship), deck of a sailing ship forward of the foremast, or, historically, the forward part of a ship with the sailors' living quarters. Related to the latter meaning is t ...
, which was used to mount a stone-throwing engine. The Byzantines invented
Greek fire Greek fire was an incendiary weapon system used by the Byzantine Empire from the seventh to the fourteenth centuries. The recipe for Greek fire was a closely-guarded state secret; historians have variously speculated that it was based on saltp ...
, an incendiary weapon that led the Muslims to cover their ships with water-soaked cotton. A major problem for the Muslim fleet was the shortage of timber, which led the Muslims to seek qualitative instead of quantitative superiority by building bigger warships. To save money, the Muslim shipwrights switched from the hull-first method of building ships to the frame-first method.


Conquest of Mesopotamia and Persia: 633–651

After an Arab incursion into Sasanian territories, the ''
shah Shāh (; ) is a royal title meaning "king" in the Persian language.Yarshater, Ehsa, ''Iranian Studies'', vol. XXII, no. 1 (1989) Though chiefly associated with the monarchs of Iran, it was also used to refer to the leaders of numerous Per ...
'' Yazdgerd III, who had just ascended the Persian throne, raised an army to resist the conquerors, although many ''
marzban Marzbān, or Marzpān (Middle Persian: 𐭬𐭫𐭱𐭰𐭠𐭭𐭯 transliteration: mrzwpn, derived from Middle Persian: 𐭬𐭫𐭱 ''marz'' "border, boundary" and the Middle Persian suffix: 𐭡𐭭𐭯 ''-pān'' "guardian"; Modern Persian: ...
s'' refused to help. The Persians suffered a devastating defeat at the Battle of al-Qadisiyyah in 636. Little is known about the Battle of al-Qadisiyyah other than it lasted for several days by the banks of the river
Euphrates The Euphrates ( ; see #Etymology, below) is the longest and one of the most historically important rivers of West Asia. Tigris–Euphrates river system, Together with the Tigris, it is one of the two defining rivers of Mesopotamia (). Originati ...
in what is now Iraq and ended with the Persian force being annihilated. Abolishing the Lakhmid Arab buffer state had forced the Persians to take over the desert defense themselves, leaving them overextended. As a result of al-Qadisiyyah, the Arab-Muslims gained control over the whole of Iraq, including
Ctesiphon Ctesiphon ( ; , ''Tyspwn'' or ''Tysfwn''; ; , ; Thomas A. Carlson et al., “Ctesiphon — ܩܛܝܣܦܘܢ ” in The Syriac Gazetteer last modified July 28, 2014, http://syriaca.org/place/58.) was an ancient city in modern Iraq, on the eastern ba ...
, the capital city of the Sassanids. The Persians lacked sufficient forces to make use of the
Zagros Mountains The Zagros Mountains are a mountain range in Iran, northern Iraq, and southeastern Turkey. The mountain range has a total length of . The Zagros range begins in northwestern Iran and roughly follows Iran's western border while covering much of s ...
to stop the Arabs, having lost the prime of their army at al-Qadisiyyah. The Persian forces withdrew over the Zagros, and the Arab army pursued them across the Iranian plateau, where the fate of the Sasanian Empire was sealed at the
Battle of Nahavand The Battle of Nahavand ( ', '), also spelled Nihavand or Nahawand, was fought in 642 between the Rashidun Caliphate, Rashidun Muslims, Muslim Rashidun army, forces under Caliphate, caliph Umar and Sasanian Empire, Sasanian Persian armies under ...
in 642. The crushing Muslim victory at Nahavand is known in the Muslim world as the "Victory of Victories". After Nahavand, the Persian state collapsed with Yezdegird III fleeing further east and various ''marzbans'' surrendering to the Arabs. As the conquerors slowly covered the vast distances of Iran punctuated by hostile towns and fortresses, Yazdgerd III retreated, finally taking refuge in Khorasan, where he was assassinated by a local
satrap A satrap () was a governor of the provinces of the ancient Median kingdom, Median and Achaemenid Empire, Persian (Achaemenid) Empires and in several of their successors, such as in the Sasanian Empire and the Hellenistic period, Hellenistic empi ...
in 651. In the aftermath of their victory over the imperial army, the Muslims still had to contend with a collection of militarily weak but geographically inaccessible principalities of Persia. It took decades to bring them all under control of the caliphate. In what is now Afghanistan—a region where the authority of the ''shah'' was always disputed—the Muslims met fierce guerrilla resistance from the militant Buddhist tribes of the region. Despite the complete Muslim triumph over Sasanid Iran as compared to the only partial defeat of the Byzantine Empire, the Muslims borrowed far more from the vanished Sassanian state than they ever did from the Byzantines. However, for the Persians the defeat remained bitter. Some 400 years later, the Persian poet
Ferdowsi Abu'l-Qâsem Ferdowsi Tusi (also Firdawsi, ; 940 – 1019/1025) was a Persians, Persian poet and the author of ''Shahnameh'' ("Book of Kings"), which is one of the world's longest epic poetry, epic poems created by a single poet, and the gre ...
lets Yazdgerd III speak in his popular poem ''
Shahnameh The ''Shahnameh'' (, ), also transliterated ''Shahnama'', is a long epic poem written by the Persian literature, Persian poet Ferdowsi between and 1010 CE and is the national epic of Greater Iran. Consisting of some 50,000 distichs or couple ...
'' (''Book of Kings''):
Damn this world, damn this time, damn this fate, That uncivilized Arabs have come to Make me a Muslim Where are your valiant warriors and priests Where are your hunting parties and your feats? Where is that warlike mien and where are those Great armies that destroyed our county's foes? Count Iran as a ruin, as the lair Of lions and leopards. Look now and despair


First Fitna: Fall of the Rashidun Caliphate

Right from the start of the caliphate, it was realized that there was a need to write down the sayings and story of Muhammad, which had been memorized by his followers before they all died. Most people in Arabia were illiterate, and the Arabs had a strong culture of remembering history orally. To preserve the story of Muhammad and to prevent any corruptions from entering the oral history, Abu Bakr had ordered scribes to write down the story of Muhammad as told to them by his followers, which was the origin of the Quran. Disputes had emerged over which version of the Quran was the correct one and, by 644 different versions of the Quran were accepted in
Damascus Damascus ( , ; ) is the capital and List of largest cities in the Levant region by population, largest city of Syria. It is the oldest capital in the world and, according to some, the fourth Holiest sites in Islam, holiest city in Islam. Kno ...
,
Basra Basra () is a port city in Iraq, southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the List of largest cities of Iraq, third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq bor ...
, Hims, and
Kufa Kufa ( ), also spelled Kufah, is a city in Iraq, about south of Baghdad, and northeast of Najaf. It is located on the banks of the Euphrates, Euphrates River. The estimated population in 2003 was 110,000. Along with Samarra, Karbala, Kadhimiya ...
. To settle the dispute, the Caliph Uthman had proclaimed the version of the Quran possessed by one of Muhammad's widows, Hafsa, to be the definitive and correct version, which offended some Muslims who held to the rival versions. This, together with the favoritism shown by 'Uthman to his own clan, the Banu Umayya, in government appointments, led to a mutiny in Medina in 656 and 'Uthman's murder.


Founding of the Umayyad Caliphate

Uthman's successor Ali was faced with a civil war, known to Muslims as the '' fitna'', when the governor of Syria
Mu'awiya ibn Abi Sufyan Mu'awiya I (–April 680) was the founder and first caliph of the Umayyad Caliphate, ruling from 661 until his death. He became caliph less than thirty years after the death of the Islamic prophet Muhammad and immediately after the four Rashid ...
revolted against him. During this time, the first period of Muslim conquests stopped, as the armies of Islam turned against one another. A group known as the '' Kharaji'' decided to end the civil war by assassinating the leaders of both sides. However, the ''fitna'' ended in January 661 when Ali was killed by a ''kharaji'' assassin, allowing
Mu'awiya Mu'awiya I (–April 680) was the founder and first caliph of the Umayyad Caliphate, ruling from 661 until his death. He became caliph less than thirty years after the death of the Islamic prophet Muhammad and immediately after the four Rashid ...
to become caliph and found the Umayyad dynasty. The ''fitna'' also marked the beginning of the split between
Shia Shia Islam is the second-largest branch of Islam. It holds that Muhammad designated Ali ibn Abi Talib () as both his political successor (caliph) and as the spiritual leader of the Muslim community (imam). However, his right is understood ...
Muslims who supported Ali, and
Sunni Sunni Islam is the largest branch of Islam and the largest religious denomination in the world. It holds that Muhammad did not appoint any successor and that his closest companion Abu Bakr () rightfully succeeded him as the caliph of the Mu ...
Muslims who opposed him. Mu'awiya moved the capital of the caliphate from Medina to Damascus, which had a major effect on the politics and culture of the caliphate. Mu'awiya followed the conquest of Iran by invading Central Asia and trying to finish off the Byzantine Empire by taking Constantinople. In 670, a Muslim fleet seized
Rhodes Rhodes (; ) is the largest of the Dodecanese islands of Greece and is their historical capital; it is the List of islands in the Mediterranean#By area, ninth largest island in the Mediterranean Sea. Administratively, the island forms a separ ...
and then laid siege to
Constantinople Constantinople (#Names of Constantinople, see other names) was a historical city located on the Bosporus that served as the capital of the Roman Empire, Roman, Byzantine Empire, Byzantine, Latin Empire, Latin, and Ottoman Empire, Ottoman empire ...
. Nicolle wrote the siege of Constantinople from 670 to 677 was "more accurately" a blockade rather than a siege proper, which ended in failure as the "mighty" walls built by the Emperor
Theodosius II Theodosius II ( ; 10 April 401 – 28 July 450), called "the Calligraphy, Calligrapher", was Roman emperor from 402 to 450. He was proclaimed ''Augustus (title), Augustus'' as an infant and ruled as the Eastern Empire's sole emperor after the ...
in the 5th century proved their worth. The majority of the people in Syria remained Christian, and a substantial Jewish minority remained as well; both communities were to teach the Arabs much about science, trade and the arts. The Umayyad caliphs are well-remembered for sponsoring a cultural "golden age" in Islamic history—for example, by building the
Dome of the Rock The Dome of the Rock () is an Islamic shrine at the center of the Al-Aqsa mosque compound on the Temple Mount in the Old City (Jerusalem), Old City of Jerusalem. It is the world's oldest surviving work of Islamic architecture, the List_of_the_ol ...
in Jerusalem and for making Damascus into the capital of a "superpower" that stretched from Portugal to Central Asia, covering the vast territory from the Atlantic Ocean to the borders of China.


Explanations for the Muslim armies' success

The rapidity of the early conquests has received various explanations. Contemporary Christian writers conceived them as God's punishment visited on their fellow Christians for their sins. Early Muslim historians viewed them as a reflection of the religious zeal of the conquerors and evidence of divine favor. The theory that the conquests are explainable as an Arab migration triggered by economic pressures enjoyed popularity early in the 20th century but has largely fallen out of favor among historians, especially those who distinguish the migration from the conquests that preceded and enabled it. There are indications that the conquests started as initially disorganized pillaging raids launched partly by non-Muslim Arab tribes in the aftermath of the Ridda Wars and were soon extended into a war of conquest by the Rashidun caliphs, although other scholars argue that the conquests were a planned military venture already underway during Muhammad's lifetime.
Fred Donner Fred McGraw Donner (born 1945) is a scholar of Islam and Peter B. Ritzma Professor of Near Eastern History at the University of Chicago.
writes that the advent of Islam "revolutionized both the ideological bases and the political structures of the Arabian society, giving rise for the first time to a state capable of an expansionist movement." According to Chase F. Robinson, it is likely that Muslim forces were often outnumbered, but unlike their opponents, they were fast, well coordinated and highly motivated. Another key reason was the weakness of the Byzantine and Sasanian Empires, caused by the wars they had waged against each other in the preceding decades with alternating success. It was aggravated by a plague that had struck densely populated areas and impeded conscription of new imperial troops, while the Arab armies could draw recruits from nomadic populations. The Sasanian Empire, which had lost the latest round of hostilities with the Byzantines, was also affected by a crisis of confidence, and its elites suspected that the ruling dynasty had forfeited the favor of the gods. The Arab military advantage was increased when Christianized Arab tribes who had served imperial armies as regular or auxiliary troops switched sides and joined the West Arabian coalition. Arab commanders also made liberal use of agreements to spare lives and property of inhabitants in case of surrender and extended exemptions from paying tribute to groups who provided military services to the conquerors. Additionally, the Byzantine persecution of Christians opposed to the
Chalcedonian creed The Chalcedonian Definition (also called the Chalcedonian Creed or the Definition of Chalcedon) is the declaration of the dyophysitism of Hypostatic union, Christ's nature, adopted at the Council of Chalcedon in AD 451. Chalcedon was an Early cen ...
in Syria and Egypt alienated elements of those communities and made them more open to accommodation with the Arabs once it became clear that the latter would let them practice their faith undisturbed as long as they paid tribute. The conquests were further secured by the subsequent large-scale migration of Arabian peoples into the conquered lands. Robert Hoyland argues that the failure of the Sasanian empire to recover was due in large part to the geographically and politically disconnected nature of Persia, which made coordinated action difficult once the established Sasanian rule collapsed. Similarly, the difficult terrain of Anatolia made it difficult for the Byzantines to mount a large-scale attack to recover the lost lands, and their offensive action was largely limited to organizing guerrilla operations against the Arabs in the Levant.


Conquest of Sindh: 711–714

Although there were sporadic incursions by Arab generals in the direction of India in the 660s and a small Arab garrison was established in the arid region of Makran in the 670s, the first large-scale Arab campaign in the Indus valley occurred when the general
Muhammad bin Qasim Muḥammad ibn al-Qāsim al-Thaqafī (; –) was an Arabs, Arab military commander in service of the Umayyad Caliphate who led the Muslim conquest of Sindh (and Punjab, part of ancient Sindh), inaugurating the Umayyad campaigns in India. His m ...
invaded
Sindh Sindh ( ; ; , ; abbr. SD, historically romanized as Sind (caliphal province), Sind or Scinde) is a Administrative units of Pakistan, province of Pakistan. Located in the Geography of Pakistan, southeastern region of the country, Sindh is t ...
in 711 after a coastal march through Makran.T.W. Haig, C.E. Bosworth. Encyclopedia of Islam 2nd ed, Brill. "Sind", vol. 9, p. 632 Three years later the Arabs controlled all of the lower
Indus valley The Indus ( ) is a transboundary river of Asia and a trans- Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in the Western Tibet region of China, flows northwest through the disp ...
. Most of the towns seem to have submitted to Arab rule under peace treaties, although there was fierce resistance in other areas, including by the forces of
Raja Dahir Raja Dahir (663 – 712 CE) was the last Hindu ruler of Sindh (in present-day Pakistan). A Brahmin ruler, his kingdom was invaded in 711 CE by the Arab Umayyad Caliphate, led by Muhammad bin Qasim, where Dahir died. According to the Chach Nama, ...
at the capital city
Debal Debal (also called Daybul, Daibul or Dēwal) was a commercial town and an ancient port in Sindh, now a province of Pakistan. The exact location of the town has been difficult to determine. The proposed identifications with Karachi, Thatta, and ...
. Arab incursions southward from Sindh were repulsed by the armies of Gurjara and
Chalukya The Chalukya dynasty () was a Classical Indian dynasty that ruled large parts of southern and central India between the 6th and the 12th centuries. During this period, they ruled as three related yet individual dynasties. The earliest dynas ...
kingdoms, and further Islamic expansion was checked by the
Rashtrakuta dynasty The Rashtrakuta Empire was a royal Indian polity ruling large parts of the Indian subcontinent between the 6th and 10th centuries. The earliest known Rashtrakuta inscription is a 7th-century copper plate grant detailing their rule from Manapu ...
, which gained control of the region shortly after.


Conquest of the Maghreb: 647–742

Arab forces began launching sporadic raiding expeditions into
Cyrenaica Cyrenaica ( ) or Kyrenaika (, , after the city of Cyrene), is the eastern region of Libya. Cyrenaica includes all of the eastern part of Libya between the 16th and 25th meridians east, including the Kufra District. The coastal region, als ...
(modern northeast
Libya Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to Egypt–Libya border, the east, Sudan to Libya–Sudan border, the southeast, Chad to Chad–L ...
) and beyond soon after their conquest of Egypt. Byzantine rule in northwest Africa at the time was largely confined to the coastal plains, while Berber kingdoms and tribes controlled the rest. In 670 Arabs founded the settlement of Qayrawan, which gave them a forward base for further expansion. Muslim historians credit the general Uqba ibn Nafi with subsequent conquest of lands extending to the Atlantic coast, although it appears to have been a temporary incursion.G. Yver. Encyclopedia of Islam 2nd ed, Brill. "Maghreb", vol. 5, p. 1189. The Berber king Kusayla and an enigmatic leader referred to as '' Kahina'' (prophetess or priestess) seem to have mounted effective, if short-lived resistance to Muslim rule at the end of the 7th century, but the sources do not give a clear picture of these events. Arab forces were able to capture
Carthage Carthage was an ancient city in Northern Africa, on the eastern side of the Lake of Tunis in what is now Tunisia. Carthage was one of the most important trading hubs of the Ancient Mediterranean and one of the most affluent cities of the classic ...
in 698 and Tangiers by 708. After the fall of Tangiers, many Berbers joined the Muslim army. In 740 Umayyad rule in the region was shaken by a major
Berber revolt The Berber Revolt or the Kharijite Revolt of 740–743 AD (122–125 AH in the Islamic calendar) took place during the reign of the Umayyad Caliph Hisham ibn Abd al-Malik and marked the first successful secession from the Arab caliphate (ruled ...
, which also involved Berber
Kharijite The Kharijites (, singular ) were an Islamic sect which emerged during the First Fitna (656–661). The first Kharijites were supporters of Ali who rebelled against his acceptance of arbitration talks to settle the conflict with his challeng ...
Muslims. After a series of defeats, the caliphate was finally able to crush the rebellion in 742, although local Berber dynasties continued to drift away from imperial control from that time on.


Conquest of Hispania and Septimania: 711–721

The Muslim conquest of
Iberia The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, compri ...
is notable for the brevity and unreliability of the available sources. Évariste Lévi-Provençal. Encyclopedia of Islam 2nd ed, Brill. "Al-Andalus", vol. 1, p. 492 After the Visigothic king of Spain Wittiza died in 710, the kingdom experienced a period of political division. The Visigothic nobility was divided between the followers of Wittiza and his successor
Roderic Roderic (also spelled Ruderic, Roderik, Roderich, or Roderick; Spanish language, Spanish and , ; died 711) was the Visigoths, Visigothic king in Hispania between 710 and 711. He is well known as "the last king of the Goths". He is actually an ex ...
. Akhila, Wittiza's son, had fled to Morocco after losing the succession struggle, and Muslim tradition states that he asked the Muslims to invade Spain. Starting in the summer of 710, the Muslim forces in Morocco had launched several successful raids into Spain, which demonstrated the weakness of the Visigothic state. Taking advantage of the situation, the Muslim Berber commander, Tariq ibn Ziyad, who was stationed in Tangiers at the time, crossed the
Strait of Gibraltar The Strait of Gibraltar is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates Europe from Africa. The two continents are separated by 7.7 nautical miles (14.2 kilometers, 8.9 miles) at its narrowest point. Fe ...
with an army of Arabs and Berbers in 711. Most of the invasion force of 15,000 were Berbers, with the Arabs serving as an "elite" force. Ziyad landed on the
Rock of Gibraltar The Rock of Gibraltar (from the Arabic name Jabal Ṭāriq , meaning "Mountain of Tariq ibn Ziyad, Tariq") is a monolithic limestone mountain high dominating the western entrance to the Mediterranean Sea. It is situated near the end of a nar ...
on 29 April 711. After defeating Roderic at the river Guadalete on 19 July 711, Muslim forces advanced, capturing cities one after another. The capital of Toledo surrendered peacefully. Some of the cities surrendered with agreements to pay tribute and local aristocracy retained a measure of former influence. The Spanish Jewish community welcomed the Muslims as liberators from the oppression of the Catholic Visigothic kings. In 712, another larger force of 18,000 from Morocco, led by Musa Ibn Nusayr, crossed the Strait of Gibraltar to link up with Ziyad's force at Talavera. The invasion seemed to have been on the initiative of Ziyad: the caliph, al-Walid, in Damascus reacted as if he was surprised to see him. By 713 Iberia was almost entirely under Muslim control. In 714, al-Walid summoned Ziyad to Damascus to explain his campaign in Spain, but Ziyad took his time travelling through North Africa and Palestine, and was finally imprisoned when he arrived in Damascus. The events of the subsequent ten years, the details of which are obscure, included the capture of
Barcelona Barcelona ( ; ; ) is a city on the northeastern coast of Spain. It is the capital and largest city of the autonomous community of Catalonia, as well as the second-most populous municipality of Spain. With a population of 1.6 million within c ...
and
Narbonne Narbonne ( , , ; ; ; Late Latin:) is a commune in Southern France in the Occitanie region. It lies from Paris in the Aude department, of which it is a sub-prefecture. It is located about from the shores of the Mediterranean Sea and was ...
, and a raid against
Toulouse Toulouse (, ; ; ) is a city in southern France, the Prefectures in France, prefecture of the Haute-Garonne department and of the Occitania (administrative region), Occitania region. The city is on the banks of the Garonne, River Garonne, from ...
, followed by an expedition into
Burgundy Burgundy ( ; ; Burgundian: ''Bregogne'') is a historical territory and former administrative region and province of east-central France. The province was once home to the Dukes of Burgundy from the early 11th until the late 15th century. ...
in 725. The last large-scale raid to the north ended with a Muslim defeat at the Battle of Tours at the hands of the Franks in 732. The victory of the Franks, led by Charles Martel, over 'Abd al-Rahman Ibn 'Abd Allah al-Ghafiqi has often been misrepresented as the decisive battle that stopped the Muslim conquest of France, but the Umayyad force had been raiding
Aquitaine Aquitaine (, ; ; ; ; Poitevin-Saintongeais: ''Aguiéne''), archaic Guyenne or Guienne (), is a historical region of southwestern France and a former Regions of France, administrative region. Since 1 January 2016 it has been part of the administ ...
with a particular interest in sacking churches and monasteries, not seeking its conquest. The battle itself is a shadowy affair with the few sources describing it in poetic terms that are frustrating for the historian. The battle occurred between 18 and 25 October 732 with the climax being an attack on the Muslim camp led by Martel that ended with al-Ghafiqi being killed and the Muslims withdrawing when night fell. Martel's victory ended whatever plans there may have been to conquer France, but a series of Berber revolts in North Africa and in Spain against Arab rule may have played a greater role in ruling out conquests north of the Pyrenees.


Conquest of Transoxiana: 673–751

Transoxiana Transoxiana or Transoxania (, now called the Amu Darya) is the Latin name for the region and civilization located in lower Central Asia roughly corresponding to eastern Uzbekistan, western Tajikistan, parts of southern Kazakhstan, parts of Tu ...
is the region northeast of Iran beyond the
Amu Darya The Amu Darya ( ),() also shortened to Amu and historically known as the Oxus ( ), is a major river in Central Asia, which flows through Tajikistan, Turkmenistan, Uzbekistan, and Afghanistan. Rising in the Pamir Mountains, north of the Hindu Ku ...
or Oxus River roughly corresponding with modern-day Uzbekistan, Tajikistan, and parts of Kazakhstan. Initial incursions across the Oxus River were aimed at
Bukhara Bukhara ( ) is the List of cities in Uzbekistan, seventh-largest city in Uzbekistan by population, with 280,187 residents . It is the capital of Bukhara Region. People have inhabited the region around Bukhara for at least five millennia, and t ...
(673) and
Samarqand Samarkand ( ; Uzbek and Tajik: Самарқанд / Samarqand, ) is a city in southeastern Uzbekistan and among the oldest continuously inhabited cities in Central Asia. Samarkand is the capital of the Samarkand Region and a district-level ...
(675), and the results were limited to promises of tribute payments. In 674, a Muslim force led by Ubaidullah Ibn Zayyad attacked Bukhara, the capital of
Sogdia Sogdia () or Sogdiana was an ancient Iranian peoples, Iranian civilization between the Amu Darya and the Syr Darya, and in present-day Uzbekistan, Turkmenistan, Tajikistan, Kazakhstan, and Kyrgyzstan. Sogdiana was also a province of the Achaemen ...
, which ended with the Sogdians agreeing to recognize the Umayadd caliph Mu'awiaya as their overlord and to pay tribute. In general, the campaigns in Central Asia were "hard fought" with the Buddhist Turkic peoples fiercely resisting efforts to incorporate them into the caliphate. China, which saw Central Asia as its own sphere of influence, particularly because of the economic importance of the
Silk Road The Silk Road was a network of Asian trade routes active from the second century BCE until the mid-15th century. Spanning over , it played a central role in facilitating economic, cultural, political, and religious interactions between the ...
, supported the Turkic defenders. Further advances were hindered for a quarter century by political upheavals within the Umayyad caliphate. This was followed by a decade of rapid military progress under the leadership of the new governor of
Khurasan KhorasanDabeersiaghi, Commentary on Safarnâma-e Nâsir Khusraw, 6th Ed. Tehran, Zavvâr: 1375 (Solar Hijri Calendar) 235–236 (; , ) is a historical eastern region in the Iranian Plateau in West Asia, West and Central Asia that encompasses wes ...
, Qutayba ibn Muslim, which included the conquest of Bukhara and Samarqand in 706–712. The expansion lost its momentum when Qutayba was killed during an army mutiny and the Arabs were placed on the defensive by an alliance of
Sogdia Sogdia () or Sogdiana was an ancient Iranian peoples, Iranian civilization between the Amu Darya and the Syr Darya, and in present-day Uzbekistan, Turkmenistan, Tajikistan, Kazakhstan, and Kyrgyzstan. Sogdiana was also a province of the Achaemen ...
n and Türgesh forces with support from
Tang China The Tang dynasty (, ; zh, c=唐朝), or the Tang Empire, was an Dynasties of China, imperial dynasty of China that ruled from 618 to 907, with an Wu Zhou, interregnum between 690 and 705. It was preceded by the Sui dynasty and followed ...
. However, reinforcements from Syria helped turn the tide and most of the lost lands were reconquered by 741. Muslim rule over Transoxania was consolidated in 751 when a Chinese-led army was defeated at the
Battle of Talas The Battle of Talas (; ) was an armed confrontation between the Abbasid Caliphate along with the Tibetan Empire against the Tang dynasty in 751. In July of that year, the Tang and Abbasid armies clashed at the Talas River over control of the r ...
.


Raids into Afghanistan

Medieveal Islamic scholars divided the area of modern-day Afghanistan into two regions: the provinces of Khorasan and
Sistan Sistān (), also known as Sakastān (, , current name: Zabol) and Sijistan (), is a historical region in south-eastern Iran and extending across the borders of present-day south-western Afghanistan, and south-western Pakistan. Mostly correspond ...
. Khorasan was the eastern satrapy of the Sasanian Empire, containing Balkh and
Herat Herāt (; Dari/Pashto: هرات) is an oasis city and the third-largest city in Afghanistan. In 2020, it had an estimated population of 574,276, and serves as the capital of Herat Province, situated south of the Paropamisus Mountains (''Se ...
. Sistan included Ghazna, Zarang, Bost, Qandahar (also called al-Rukhkhaj or Zamindawar),
Kabul Kabul is the capital and largest city of Afghanistan. Located in the eastern half of the country, it is also a municipality, forming part of the Kabul Province. The city is divided for administration into #Districts, 22 municipal districts. A ...
, Kabulistan and Zabulistan. Before Muslim rule, the regions of Balkh (
Bactria Bactria (; Bactrian language, Bactrian: , ), or Bactriana, was an ancient Iranian peoples, Iranian civilization in Central Asia based in the area south of the Oxus River (modern Amu Darya) and north of the mountains of the Hindu Kush, an area ...
or ''Tokharistan''), Herat and Sistan were under Sasanian rule. Further south in the Balkh region, in Bamiyan, indication of Sasanian authority diminishes, with a local dynasty apparently ruling from
late antiquity Late antiquity marks the period that comes after the end of classical antiquity and stretches into the onset of the Early Middle Ages. Late antiquity as a period was popularized by Peter Brown (historian), Peter Brown in 1971, and this periodiza ...
, probably
Hephthalites The Hephthalites (), sometimes called the White Huns (also known as the White Hunas, in Iranian languages, Iranian as the ''Spet Xyon'' and in Sanskrit and Prakrit as the ''Sveta-huna''), were a people who lived in Central Asia during the 5th to ...
subject to the Yabghu of the
Western Turkic Khaganate The Western Turkic Khaganate () or Onoq Khaganate () was a Turkic khaganate in Eurasia, formed as a result of the wars in the beginning of the 7th century (593–603 CE) after the split of the First Turkic Khaganate (founded in the 6th century o ...
. While Herat was controlled by the Sasanians, its hinterlands were controlled by northern Hepthalites who continued to rule the Ghurid mountains and river valleys well into the Islamic era. Sistan was under Sasanian administration, but Qandahar remained out of Arab hands. Kabul and Zabulistan housed Indic religions, with the Zunbils and Kabul Shahis (for the most part) offering stiff resistance to Muslim rule for two centuries until the Saffarid and
Ghaznavid The Ghaznavid dynasty ( ''Ġaznaviyān'') was a Persianate Muslim dynasty of Turkic ''mamluk'' origin. It ruled the Ghaznavid Empire or the Empire of Ghazni from 977 to 1186, which at its greatest extent, extended from the Oxus to the Indus Va ...
conquests. The Umayyad Caliphate regularly claimed nominal overlordship over the Zunbils and Kabul Shahis, and in 711 Qutayba ibn Muslim managed to force them to pay tribute.


Other expeditions


Cyprus, Armenia, and Georgia

In 646 a Byzantine naval expedition was able to briefly recapture Alexandria. The same year
Mu'awiya Mu'awiya I (–April 680) was the founder and first caliph of the Umayyad Caliphate, ruling from 661 until his death. He became caliph less than thirty years after the death of the Islamic prophet Muhammad and immediately after the four Rashid ...
, the governor of Syria and future founder of the Umayyad dynasty, ordered construction of a fleet. Three years later it was put to use in a pillaging raid of
Cyprus Cyprus (), officially the Republic of Cyprus, is an island country in the eastern Mediterranean Sea. Situated in West Asia, its cultural identity and geopolitical orientation are overwhelmingly Southeast European. Cyprus is the List of isl ...
, followed by a raid in 650 that concluded with a treaty under which Cypriots surrendered many of their riches and slaves. In 688 the island was made into a joint dominion of the caliphate and the Byzantine Empire under a pact which was to last for almost 300 years. In 639–640 Arab forces began to make advances into Armenia, which had been partitioned into a
Byzantine province Subdivisions of the Byzantine Empire were administrative units of the Eastern Roman or Byzantine Empire (330–1453). The Empire had a developed administrative system, which can be divided into three major periods: the late Roman/early Byzantine, ...
and a Sasanian province. M. Canard. Encyclopedia of Islam 2nd ed, Brill. "Arminiya", vol. 1, pp. 636–637 There is considerable disagreement among ancient and modern historians about events of the following years, and nominal control of the region may have passed several times between Arabs and Byzantines. Although Muslim dominion was finally established by the time the Umayyads acceded to power in 661, it was not able to implant itself solidly in the country, and Armenia experienced a national and literary efflorescence over the next century. As with Armenia, Arab advances into other lands of the
Caucasus The Caucasus () or Caucasia (), is a region spanning Eastern Europe and Western Asia. It is situated between the Black Sea and the Caspian Sea, comprising parts of Southern Russia, Georgia, Armenia, and Azerbaijan. The Caucasus Mountains, i ...
region, including
Georgia Georgia most commonly refers to: * Georgia (country), a country in the South Caucasus * Georgia (U.S. state), a state in the southeastern United States Georgia may also refer to: People and fictional characters * Georgia (name), a list of pe ...
, had as their end assurances of tribute payment and these principalities retained a large degree of autonomy. C.E. Bosworth. Encyclopedia of Islam 2nd ed, Brill. "Al-Qabq", vol. 4, pp. 343–344 This period also saw a series of clashes with the
Khazar The Khazars ; 突厥可薩 ''Tūjué Kěsà'', () were a nomadic Turkic people who, in the late 6th century CE, established a major commercial empire covering the southeastern section of modern European Russia, southern Ukraine, Crimea, an ...
kingdom whose center of power was in the lower
Volga The Volga (, ) is the longest river in Europe and the longest endorheic basin river in the world. Situated in Russia, it flows through Central Russia to Southern Russia and into the Caspian Sea. The Volga has a length of , and a catchment ...
steppes, and which vied with the caliphate over control of the Caucasus.


Failed incursions into Greece and Afghanistan

Other Muslim military ventures were met with outright failure. Despite a naval victory over the Byzantines in 654 at the Battle of the Masts, the subsequent attempt to besiege Constantinople was frustrated by a storm which damaged the Arab fleet. Later sieges of Constantinople in 668–669 (674–678 according to other estimates) and 717–718 were thwarted with the help of the recently invented
Greek fire Greek fire was an incendiary weapon system used by the Byzantine Empire from the seventh to the fourteenth centuries. The recipe for Greek fire was a closely-guarded state secret; historians have variously speculated that it was based on saltp ...
. In the east, although Arabs were able to establish control over most Sasanian-controlled areas of modern Afghanistan after the fall of Persia, the Kabul region resisted repeated attempts at invasion and would continue to do so until it was conquered by the Saffarids three centuries later.


End of the conquests

By the time of the Abbasid Revolution in the middle of the 8th century, Muslim armies had come against a combination of natural barriers and powerful states that impeded any further military progress. The wars produced diminishing returns in personal gains and fighters increasingly left the army for civilian occupations. The priorities of the rulers also shifted from conquest of new lands to administration of the acquired empire. Although the Abbasid era witnessed some new territorial gains, such as the conquests of
Sicily Sicily (Italian language, Italian and ), officially the Sicilian Region (), is an island in the central Mediterranean Sea, south of the Italian Peninsula in continental Europe and is one of the 20 regions of Italy, regions of Italy. With 4. ...
and
Crete Crete ( ; , Modern Greek, Modern: , Ancient Greek, Ancient: ) is the largest and most populous of the Greek islands, the List of islands by area, 88th largest island in the world and the List of islands in the Mediterranean#By area, fifth la ...
, the period of rapid centralized expansion would now give way to an era when further spread of Islam would be slow and accomplished through the efforts of local dynasties, missionaries, and traders.


Aftermath


Significance

Nicolle writes that the series of Islamic conquests of the 7th and 8th centuries was "one of the most significant events in world history", leading to the creation of "a new civilisation", the Islamicised and Arabised Middle East. Islam, which had previously been confined to Arabia, became a major world religion, while the synthesis of Arab, Byzantine, and Sasanian elements led to distinctive new styles of art and architecture emerging in the Middle East. English historian
Edward Gibbon Edward Gibbon (; 8 May 173716 January 1794) was an English essayist, historian, and politician. His most important work, ''The History of the Decline and Fall of the Roman Empire'', published in six volumes between 1776 and 1789, is known for ...
writes in ''
The History of the Decline and Fall of the Roman Empire ''The History of the Decline and Fall of the Roman Empire'', sometimes shortened to ''Decline and Fall of the Roman Empire'', is a six-volume work by the English historian Edward Gibbon. The six volumes cover, from 98 to 1590, the peak of the Ro ...
'':


Socio-political developments

The military victories of armies from the Arabian Peninsula heralded the expansion of Arab culture and religion. The conquests were followed by a large-scale migration of families and whole tribes from Arabia into the lands of the Middle East. The conquering Arabs had already possessed a complex and sophisticated society. Emigrants from Yemen brought with them agricultural, urban, and monarchical traditions; members of the Ghassanid and Lakhmid tribal confederations had experience collaborating with the empires. The rank and file of the armies was drawn from both nomadic and sedentary tribes, while the leadership came mainly from the merchant class of the
Hejaz Hejaz is a Historical region, historical region of the Arabian Peninsula that includes the majority of the western region of Saudi Arabia, covering the cities of Mecca, Medina, Jeddah, Tabuk, Saudi Arabia, Tabuk, Yanbu, Taif and Al Bahah, Al-B ...
. Two fundamental policies were implemented during the reign of the second caliph Umar (): the Bedouins would not be allowed to damage agricultural production of the conquered lands, and the leadership would cooperate with the local elites. To that end, the Arab-Muslim armies were settled in segregated quarters or new garrison towns such as
Basra Basra () is a port city in Iraq, southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the List of largest cities of Iraq, third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq bor ...
,
Kufa Kufa ( ), also spelled Kufah, is a city in Iraq, about south of Baghdad, and northeast of Najaf. It is located on the banks of the Euphrates, Euphrates River. The estimated population in 2003 was 110,000. Along with Samarra, Karbala, Kadhimiya ...
, and
Fustat Fustat (), also Fostat, was the first capital of Egypt under Muslim rule, though it has been integrated into Cairo. It was built adjacent to what is now known as Old Cairo by the Rashidun Muslim general 'Amr ibn al-'As immediately after the Mus ...
. The latter two became the new administrative centers of Iraq and Egypt, respectively. Soldiers were paid a stipend and prohibited from seizing lands. Arab governors supervised collection and distribution of taxes but otherwise left the old religious and social order intact. At first, many provinces retained a large degree of autonomy under the terms of agreements made with Arab commanders. As the time passed, the conquerors sought to increase their control over local affairs and make existing administrative machinery work for the new regime. This involved several types of reorganization. In the Mediterranean region, city-states which traditionally governed themselves and their surrounding areas were replaced by a territorial bureaucracy separating town and rural administration. In Egypt, fiscally independent estates and municipalities were abolished in favor of a simplified administrative system. In the early 8th century, Syrian Arabs began to replace Coptic functionaries and communal levies gave way to individual taxation. In Iran, the administrative reorganization and construction of protective walls prompted agglomeration of quarters and villages into large cities such as
Isfahan Isfahan or Esfahan ( ) is a city in the Central District (Isfahan County), Central District of Isfahan County, Isfahan province, Iran. It is the capital of the province, the county, and the district. It is located south of Tehran. The city ...
,
Qazvin Qazvin (; ; ) is a city in the Central District (Qazvin County), Central District of Qazvin County, Qazvin province, Qazvin province, Iran, serving as capital of the province, the county, and the district. It is the largest city in the provi ...
, and Qum. Local notables of Iran, who at first had almost complete autonomy, were incorporated into the central bureaucracy by the Abbasid period. The similarity of Egyptian and Khurasanian official paperwork at the time of the caliph
al-Mansur Abū Jaʿfar ʿAbd Allāh ibn Muḥammad al-Manṣūr (; ‎; 714 – 6 October 775) usually known simply as by his laqab al-Manṣūr () was the second Abbasid caliph, reigning from 754 to 775 succeeding his brother al-Saffah (). He is known ...
() suggests a highly centralized empire-wide administration.


New Arab settlements

The society of new Arab settlements gradually became stratified into classes based on wealth and power. It was also reorganized into new communal units that preserved clan and tribal names but were in fact only loosely based around old kinship bonds. Arab settlers turned to civilian occupations and in eastern regions established themselves as a landed aristocracy. At the same time, distinctions between the conquerors and local populations began to blur. In Iran, the Arabs largely assimilated into local culture, adopting the Persian language and customs and marrying Persian women. In Iraq, non-Arab settlers flocked to garrison towns. Soldiers and administrators of the old regime came to seek their fortunes with the new masters, while slaves, laborers and peasants fled there seeking to escape the harsh conditions of life in the countryside. Non-Arab converts to Islam were absorbed into the Arab-Muslim society through an adaptation of the tribal Arabian institution of clientage, in which protection of the powerful was exchanged for loyalty of the subordinates. The clients (''
mawali ''Mawlā'' (, plural ''mawālī'' ), is a polysemous Arabic word, whose meaning varied in different periods and contexts.A.J. Wensinck, Encyclopedia of Islam 2nd ed, Brill. "Mawlā", vol. 6, p. 874. Before the Islamic prophet Muhammad, the te ...
'') and their heirs were regarded as virtual members of the clan. The clans became increasingly economically and socially stratified. For example, while the noble clans of the Tamim tribe acquired Persian cavalry units as their mawali, other clans of the same tribe had slave laborers as theirs. Slaves often became mawali of their former masters when they were freed. Contrary to the belief of earlier historians, there is no evidence of mass conversions to Islam in the immediate aftermath of the conquests. The first groups to convert were Christian Arab tribes, although some of them retained their religion into the Abbasid era even while serving as troops of the caliphate. They were followed by former elites of the Sasanian empire, whose conversion ratified their old privileges. With time, the weakening of non-Muslim elites facilitated the breakdown of old communal ties and reinforced the incentives of conversion which promised economic advantages and social mobility. By the beginning of the 8th century, conversions became a policy issue for the caliphate. They were favored by religious activists, and many Arabs accepted the equality of Arabs and non-Arabs. However, conversion was associated with economic and political advantages, and Muslim elites were reluctant to see their privileges diluted. Public policy towards converts varied depending on the region and was changed by successive Umayyad caliphs. These circumstances provoked opposition from non-Arab converts, whose ranks included many active soldiers, and helped set the stage for the civil war which ended with the fall of the Umayyad dynasty.


Taxation policies and conversions to Islam

The Arab-Muslim conquests followed a general pattern of nomadic conquests of settled regions, whereby the conquering peoples became the new military elite and reached a compromise with the old elites by allowing them to retain local political, religious, and financial authority. Peasants, workers, and merchants paid taxes, while members of the old and new elites collected them. Payment of taxes, which for peasants often reached half of the value of their produce, was an economic burden as well as a mark of social inferiority. Scholars differ in their assessment of relative tax burdens before and after the conquests.
John Esposito John Louis Esposito (born May 19, 1940) is an American academic, professor of Middle Eastern studies, Middle Eastern and religious studies, and scholar of Islamic studies, who serves as Professor of Religion, International Affairs, and Islamic S ...
states that in effect this meant lower taxes. According to
Bernard Lewis Bernard Lewis, (31 May 1916 – 19 May 2018) was a British-American historian specialized in Oriental studies. He was also known as a public intellectual and political commentator. Lewis was the Cleveland E. Dodge Professor Emeritus of Near ...
, available evidence suggests that the change from Byzantine to Arab rule was "welcomed by many among the subject peoples, who found the new yoke far lighter than the old, both in taxation and in other matters". In contrast, Norman Stillman writes that although the tax burden of the Jews under early Islamic rule was comparable to that under previous rulers, Christians of the Byzantine Empire (though not Christians of the Persian empire, whose status was similar to that of the Jews) and Zoroastrians of Iran shouldered a considerably heavier burden in the immediate aftermath of the conquests. In the wake of the early conquests taxes could be levied on individuals, on the land, or as collective tribute. During the first century of Islamic expansion, the words ''
jizya Jizya (), or jizyah, is a type of taxation levied on non-Muslim subjects of a state governed by Sharia, Islamic law. The Quran and hadiths mention jizya without specifying its rate or amount,Sabet, Amr (2006), ''The American Journal of Islamic Soc ...
'' and ''
kharaj Kharāj () is a type of individual Islamic tax on agricultural land and its produce, regardless of the religion of the owners, developed under Islamic law. With the first Muslim conquests in the 7th century, the ''kharaj'' initially was synonym ...
'' were used in all three senses, with context distinguishing between individual and land taxes. Regional variations in taxation at first reflected the diversity of previous systems. The Sasanian Empire had a general tax on land and a poll tax having several rates based on wealth, with an exemption for aristocracy. This poll tax was adapted by Arab rulers, so that the aristocracy exemption was assumed by the new Arab-Muslim elite and shared by local aristocracy who converted to Islam. The nature of Byzantine taxation remains partly unclear, but it appears to have been levied as a collective tribute on population centers and this practice was generally followed under the Arab rule in former Byzantine provinces. Collection of taxes was delegated to autonomous local communities on the condition that the burden be divided among its members in the most equitable manner. In most of Iran and Central Asia local rulers paid a fixed tribute and maintained their autonomy in tax collection.


Tax evasion and reforms

Difficulties in tax collection soon appeared. Egyptian Copts, who had been skilled in tax evasion since Roman times, were able to avoid paying the taxes by entering monasteries, which were initially exempt from taxation, or simply by leaving the district where they were registered. This prompted imposition of taxes on monks and introduction of movement controls. In Iraq, many peasants who had fallen behind with their tax payments converted to Islam and abandoned their land for Arab garrison towns in hope of escaping taxation. Faced with a decline in agriculture and a treasury shortfall, the governor of Iraq, al-Hajjaj ibn Yusuf, forced peasant converts to return to their lands and subjected them to the taxes again, effectively forbidding them from converting to Islam. In Khorasan, a similar phenomenon forced the native aristocracy to compensate for the shortfall in tax collection out of their own pockets, and they responded by persecuting peasant converts and imposing heavier taxes on poor Muslims. The situation where conversion to Islam was penalized in an Islamic state could not last, and the Umayyad caliph
Umar ibn Abd al-Aziz Umar ibn Abd al-Aziz ibn Marwan (; February 720) was the eighth Umayyad caliph, ruling from 717 until his death in 720. He is credited to have instituted significant reforms to the Umayyad central government, by making it much more efficient and ...
() has been credited with changing the taxation system. Modern historians doubt this account, although details of the transition to the system of taxation elaborated by Abbasid-era jurists are unclear. Umar II ordered governors to cease collection of taxes from Muslim converts, but his successors obstructed this policy and some governors sought to stem the tide of conversions by introducing additional requirements such as circumcision and the ability to recite passages from the Quran. Taxation-related grievances of non-Arab Muslims contributed to the opposition movements which resulted in the Abbasid Revolution. Under the new system that was eventually established, kharaj came to be regarded as a tax levied on the land, regardless of the taxpayer's religion. The poll-tax was no longer levied on Muslims, but the treasury did not necessarily suffer and converts did not gain as a result, since they had to pay
zakat Zakat (or Zakāh زكاة) is one of the Five Pillars of Islam. Zakat is the Arabic word for "Giving to Charity" or "Giving to the Needy". Zakat is a form of almsgiving, often collected by the Muslim Ummah. It is considered in Islam a relig ...
, which was probably instituted as a compulsory tax on Muslims around 730. The terminology became specialized during the Abbasid era, so that ''kharaj'' no longer meant anything more than land tax, while the term ''jizya'' was restricted to the poll-tax on
dhimmi ' ( ', , collectively ''/'' "the people of the covenant") or () is a historical term for non-Muslims living in an Islamic state with legal protection. The word literally means "protected person", referring to the state's obligation under ''s ...
s. The influence of jizya on conversion has been a subject of scholarly debate. Julius Wellhausen holds that the poll tax amounted to so little that exemption from it did not constitute sufficient economic motive for conversion. Similarly, Thomas Arnold states that jizya was "too moderate" to constitute a burden, "seeing that it released them from the compulsory military service that was incumbent on their Muslim fellow subjects." He further adds that converts escaping taxation would have to pay the legal alms, zakat, that is annually levied on most kinds of movable and immovable property.
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Other early 20th century scholars suggest that non-Muslims converted to Islam ''en masse'' in order to escape the poll tax, but this theory has been challenged by more recent research. Daniel Dennett has shown that other factors, such as desire to retain social status, had greater influence on this choice in the early Islamic period.


Sharia and non-Muslims

The Arab conquerors did not repeat the mistakes which had been made by the governments of the Byzantine and Sasanian empires, which had tried and failed to impose an official religion on subject populations, which had caused resentments that made the Muslim conquests more acceptable to them. Instead, the rulers of the new empire generally respected the traditional middle-Eastern pattern of religious pluralism, which was not one of equality but rather of dominance by one group over the others. After the end of military operations, which involved sacking of some monasteries and confiscation of Zoroastrian fire temples in Syria and Iraq, the early caliphate was characterized by religious tolerance and peoples of all ethnicities and religions blended in public life. Before Muslims were ready to build mosques in Syria, they accepted Christian churches as holy places and shared them with local Christians. In Iraq and Egypt, Muslim authorities cooperated with Christian religious leaders. Numerous churches were repaired and new ones built during the Umayyad era. The first Umayyad caliph Muawiyah made deliberate efforts to convince those whom he had conquered that he was not opposed to their religion, and tried to enlist support from Christian Arab elites. There is no evidence for public display of Islam by the state before the reign of Abd al-Malik (685–705), when Quranic verses and references to Muhammad suddenly became prominent on coins and official documents. This change was motivated by a desire to unify the Muslim community after the second civil war and rally them against their chief common enemy, the Byzantine Empire. A further change of policy occurred during the reign of Umar II (717–720). The disastrous failure of the siege of Constantinople in 718 which was accompanied by massive Arab casualties led to a spike of popular animosity among Muslims toward Byzantium and Christians in general. At the same time, many Arab soldiers left the army for civilian occupations and they wished to emphasize their high social status among the conquered peoples. These events prompted introduction of restrictions on non-Muslims, which, according to Hoyland, were modeled both on Byzantine curbs on Jews, starting with the Theodosian Code and later codes, which contained prohibitions against building new synagogues and giving testimony against Christians, and on Sassanid regulations that prescribed distinctive attire for different social classes. In the following decades Islamic jurists elaborated a legal framework in which other religions would have a protected but subordinate status. Islamic law followed the Byzantine precedent of classifying subjects of the state according to their religion, in contrast to the Sasanian model which put more weight on social than on religious distinctions. In theory, like the Byzantine empire, the caliphate placed severe restrictions on paganism, but in practice most non-Abrahamic communities of the former Sasanian territories were classified as possessors of a scripture (''ahl al-kitab'') and granted protected (''
dhimmi ' ( ', , collectively ''/'' "the people of the covenant") or () is a historical term for non-Muslims living in an Islamic state with legal protection. The word literally means "protected person", referring to the state's obligation under ''s ...
'') status.


Jews and Christians

In Islam, Christians and Jews are seen as " People of the Book" as the Muslims accept both Jesus Christ and the Jewish prophets as their own prophets, which accorded them a respect that was not reserved to the "heathen" peoples of Iran, Central Asia and India. In places like the Levant and Egypt, both Christians and Jews were allowed to maintain their churches and synagogues and keep their own religious organizations in exchange for paying the ''jizya'' tax. At times, the caliphs engaged in triumphalist gestures, like building the famous Dome of the Rock mosque in Jerusalem from 690 to 692 on the site of the Jewish Second Temple, which had been destroyed by the Romans in 70 AD—though the use of Roman and Sassanian symbols of power in the mosque suggests its purpose was partly to celebrate the Arab victories over the two empires. Those Christians out of favor with the prevailing orthodoxy in the Roman Empire often preferred to live under Muslim rule as it meant the end of persecution. As both the Jewish and Christian communities of the Levant and North Africa were better educated than their conquerors, they were often employed as civil servants in the early years of the caliphate. However, a reported saying of Muhammad that "Two religions may not dwell together in Arabia" led to different policies being pursued in Arabia with conversion to Islam being imposed rather than merely encouraged. With the notable exception of Yemen, where a large Jewish community existed right up until the middle of the 20th century, all of the Christian and Jewish communities in Arabia "completely disappeared". The Jewish community of Yemen seems to have survived as Yemen was not regarded as part of Arabia proper in the same way that the Hejaz and the Nejd were. Mark R. Cohen writes that the jizya paid by Jews under Islamic rule provided a "surer guarantee of protection from non-Jewish hostility" than that possessed by Jews in the Latin West, where Jews "paid numerous and often unreasonably high and arbitrary taxes" in return for official protection, and where treatment of Jews was governed by charters which new rulers could alter at will upon accession or refuse to renew altogether. The
Pact of Umar The Pact of Umar (also known as the Covenant of Umar, Treaty of Umar or Laws of Umar; or or ) is a treaty between the Muslims and non-Muslims who were conquered by Umar during his conquest of the Levant (Syria and Lebanon) in the year 637 CE ...
, which stipulated that Muslims must "do battle to guard" the dhimmis and "put no burden on them greater than they can bear", was not always upheld, but it remained "a steadfast cornerstone of Islamic policy" into early modern times. Some Persians, now known as Parsees, fled to India to continue to follow the pre-Islamic traditions and religion of their homeland.


See also

* Ghazi *
Islam and war Islam is an Abrahamic religions, Abrahamic monotheistic religion based on the Quran, and the teachings of Muhammad. Adherents of Islam are called Muslims, who are estimated to number Islam by country, 2 billion worldwide and are the world ...
*
Islam in Europe Islam is the second-largest religion in Europe after Christianity. Although the majority of Muslim communities in Western Europe formed as a result of immigration, there are centuries-old indigenous European Muslim communities in the Balkans, ...
*
History of Islam The history of Islam is believed, by most historians, to have originated with Muhammad's mission in Mecca and Medina at the start of the 7th century CE, although Muslims regard this time as a return to the original faith passed down by the Abr ...
*
Spread of Islam The spread of Islam spans almost 1,400 years. The early Muslim conquests that occurred following the death of Muhammad in 632 CE led to the creation of the caliphates, expanding over a vast geographical area; conversion to Islam was boosted ...
* Pre-modern human migration


Notes


References


Citations


General and cited sources

* * * * * *
Edward Gibbon Edward Gibbon (; 8 May 173716 January 1794) was an English essayist, historian, and politician. His most important work, ''The History of the Decline and Fall of the Roman Empire'', published in six volumes between 1776 and 1789, is known for ...
, ''
The History of the Decline and Fall of the Roman Empire ''The History of the Decline and Fall of the Roman Empire'', sometimes shortened to ''Decline and Fall of the Roman Empire'', is a six-volume work by the English historian Edward Gibbon. The six volumes cover, from 98 to 1590, the peak of the Ro ...
''
Chapter 51
* * * * * * * * * * * {{DEFAULTSORT:Muslim Conquests Early Muslim conquests 7th century in Iran 8th century in al-Andalus 8th century in Iran History of the Arabs History of the Levant History of the Mediterranean Islam in Egypt Wars involving the Rashidun Caliphate Wars involving the Umayyad Caliphate