Rajyavardhana, also known as Rajya Vardhan, was the king of Thanesar from 605 to 606, and the eldest son of Prabhakarvardhana and member of the

Pushyabhuti dynasty The Pushyabhuti dynasty (IAST: Puṣyabhūti), also known as the Vardhana dynasty, was the ruling dynasty of the Kingdom of Thanesar in northern India during the 6th and 7th centuries. The dynasty reached its zenith under its last ruler Harshav ...

. He ascended the throne after his father's death and was succeeded by his younger brother,

Harsha Harshavardhana (Sanskrit: हर्षवर्धन; 4 June 590 – 647) was an emperor of Kannauj from April 606 until his death in 647. He was the king of Thanesar who had defeated the Alchon Huns, and the younger brother of Rajyava ...

. Contemporary information regarding the life of Rajyavardhana is limited in scope and utility. He is mentioned by

Xuanzang Xuanzang (; ; 6 April 6025 February 664), born Chen Hui or Chen Yi (), also known by his Sanskrit Dharma name Mokṣadeva, was a 7th-century Chinese Bhikkhu, Buddhist monk, scholar, traveller, and translator. He is known for the epoch-making ...

, the Chinese traveller, and in ''

Harshacharita The ''Harshacharita'' (, ; English: ''The deeds of Harsha'') is the biography of Indian emperor Harsha by Banabhatta, also known as Bana, who was a Sanskrit writer of seventh-century CE India. He was the ''Asthana Kavi'', meaning ''Court Poet ...

'', a seventh-century CE work by the poet and bard Bāṇabhaṭṭa. Neither offer impartial accounts and they differ in substantive details. The military historian Kaushik Roy describes ''Harshacharita'' as "historical fiction" but with a factually correct foundation. Rajyavardhana was the elder of two sons of Prabhakarvardhana and his queen, Yasomati. The couple also had a daughter, Rajyashri, who married Grahavarman, a member of the

Maukhari The Maukhari dynasty ( Gupta script: , ''Mau-kha-ri'') was a post- Gupta dynasty who controlled the vast plains of Ganga-Yamuna for over six generations from their capital at Kanyakubja. They earlier served as vassals of the Guptas and later ...

ruling family at

Kannauj Kannauj (Hindustani language, Hindustani pronunciation: ) is an ancient city, administrative headquarters and a municipal board or Nagar palika, Nagar Palika Parishad in Kannauj district in the Indian States and territories of India, state of Ut ...

. Prabhakarvardana was the powerful ruler of the Thanesar region around 585-606 CE, although exact dates are uncertain. The historian Ramesh Chandra Majumdar says he died and was succeeded by Rajyavardhana in 604 CE but Kaushik Roy gives 606 CE as the year, and some sources say 605. Prabhakarvardhana had expanded his territory by defeating rulers in

Gujarat Gujarat () is a States of India, state along the Western India, western coast of India. Its coastline of about is the longest in the country, most of which lies on the Kathiawar peninsula. Gujarat is the List of states and union territories ...

Gandhara Gandhara () was an ancient Indo-Aryan people, Indo-Aryan civilization in present-day northwest Pakistan and northeast Afghanistan. The core of the region of Gandhara was the Peshawar valley, Peshawar (Pushkalawati) and Swat valleys extending ...

and Sind, and he had also resisted the invasion of the

Huna people Hunas or Huna (Middle Brahmi script: ''Hūṇā'') was the name given by the ancient Indians to a group of Central Asian tribes who, via the Khyber Pass, entered the Indian subcontinent at the end of the 5th or early 6th century. The Hunas occu ...

. He died while his sons were fighting the Hunas. The marriage alliance of Grahavarman and Rajyashri had strengthened ties between the families to a point that

Shashanka Shashanka Dev (International Alphabet of Sanskrit Transliteration, IAST: Śaśāṅka) was the first independent king of a unified polity in the Bengal region, called the Gauda Kingdom. He reigned in the 7th century, some historians place his r ...

, the ruler of the

Gauda kingdom The Gauḍa kingdom was a kingdom during the Classical India, Classical era in the Indian subcontinent, which originated in the Gauḍa (region), Gauda region of Bengal (modern-day West Bengal and Bangladesh) in 4th century CE or possibly earl ...

Bengal Bengal ( ) is a Historical geography, historical geographical, ethnolinguistic and cultural term referring to a region in the Eastern South Asia, eastern part of the Indian subcontinent at the apex of the Bay of Bengal. The region of Benga ...

, found unacceptable. He retaliated by allying with the Malava kingdom and the forces appear to have launched a successful surprise attack on the Maukhari capital at Kannauj. Grahavarman was killed and Rajyashri captured at this time, which caused Rajyavardhana to retaliate in turn. He commanded a 10,000-strong

cavalry Historically, cavalry (from the French word ''cavalerie'', itself derived from ''cheval'' meaning "horse") are groups of soldiers or warriors who Horses in warfare, fight mounted on horseback. Until the 20th century, cavalry were the most mob ...

force that was successful in defeating the Malava ruler, with the main army of

infantry Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadl ...

and

war elephant A war elephant is an elephant that is Animal training, trained and guided by humans for combat purposes. Historically, the war elephant's main use was to charge (warfare), charge the enemy, break their ranks, and instill terror and fear. Elep ...

s supporting it under the charge of his younger brother, Harsha. Rajyavardhana's success was against an advance guard of his enemy. He died later in 606 as he made his way onwards to press an action at Kannauj itself. He was perhaps murdered by Shashanka, who may have invited him to a meeting with treachery in mind, although the only sources for this claim are Bāṇabhaṭṭa and Xuanzang, who both had reasons to write unfavourably of Shashanka. Harsha succeeded Rajyavardhana as ruler of Thanesar and vowed to avenge his brother's death.

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