The siege of Tortona in 1155 was the first major military engagement resulting from

Holy Roman Emperor The Holy Roman Emperor, originally and officially the Emperor of the Romans ( la, Imperator Romanorum, german: Kaiser der Römer) during the Middle Ages, and also known as the Roman-German Emperor since the early modern period ( la, Imperat ...

Frederick Barbarossa Frederick Barbarossa (December 1122 – 10 June 1190), also known as Frederick I (german: link=no, Friedrich I, it, Federico I), was the Holy Roman Emperor from 1155 until his death 35 years later. He was elected King of Germany in Frankfurt ...

's ambition to enforce

Imperial Imperial is that which relates to an empire, emperor, or imperialism. Imperial or The Imperial may also refer to: Places United States * Imperial, California * Imperial, Missouri * Imperial, Nebraska * Imperial, Pennsylvania * Imperial, Texas ...

hegemony Hegemony (, , ) is the political, economic, and military predominance of one State (polity), state over other states. In Ancient Greece (8th BC – AD 6th ), hegemony denoted the politico-military dominance of the ''hegemon'' city-state over oth ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

Background

Frederick began his first Italian campaign in October 1154, allegedly to attack the

Norman Kingdom of Sicily The Kingdom of Sicily ( la, Regnum Siciliae; it, Regno di Sicilia; scn, Regnu di Sicilia) was a state that existed in the south of the Italian Peninsula and for a time the region of Ifriqiya from its founding by Roger II of Sicily in 1130 unt ...

in accordance with an agreement with the

Pope The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...

. Upon encountering resistance and insubordination from the Northern Italian city states, his ostensible subjects, Frederick declared a preliminary

Imperial ban The imperial ban (german: Reichsacht) was a form of outlawry in the Holy Roman Empire. At different times, it could be declared by the Holy Roman Emperor, by the Imperial Diet, or by courts like the League of the Holy Court (''Vehmgericht'') or t ...

Milan Milan ( , , Lombard: ; it, Milano ) is a city in northern Italy, capital of Lombardy, and the second-most populous city proper in Italy after Rome. The city proper has a population of about 1.4 million, while its metropolitan city ...

in December 1154.

Prelude

In February 1155 he advanced to capture

Tortona Tortona (; pms, Torton-a , ; lat, Dhertona) is a '' comune'' of Piemonte, in the Province of Alessandria, Italy. Tortona is sited on the right bank of the Scrivia between the plain of Marengo and the foothills of the Ligurian Apennines. Histor ...

, a key Milanese ally and an enemy of his

Pavia Pavia (, , , ; la, Ticinum; Medieval Latin: ) is a town and comune of south-western Lombardy in northern Italy, south of Milan on the lower Ticino river near its confluence with the Po. It has a population of c. 73,086. The city was the ...

n supporters. The

citadel A citadel is the core fortified area of a town or city. It may be a castle, fortress, or fortified center. The term is a diminutive of "city", meaning "little city", because it is a smaller part of the city of which it is the defensive core. In ...

of Tortona, situated on a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher ...

, held a commanding position over the

Po valley The Po Valley, Po Plain, Plain of the Po, or Padan Plain ( it, Pianura Padana , or ''Val Padana'') is a major geographical feature of Northern Italy. It extends approximately in an east-west direction, with an area of including its Venetic ex ...

and was protected by massive

wall A wall is a structure and a surface that defines an area; carries a load; provides security, shelter, or soundproofing; or, is decorative. There are many kinds of walls, including: * Walls in buildings that form a fundamental part of the s ...

s and

fortified tower A fortified tower (also defensive tower or castle tower or, in context, just tower) is one of the defensive structures used in fortifications, such as castles, along with curtain walls. Castle towers can have a variety of different shapes and fu ...

s. The Imperials began by

reconnoiter In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmishers, ...

ing the town on 7 February, then proceeded to launch a failed

surprise attack Military deception (MILDEC) is an attempt by a military unit to gain an advantage during warfare by misleading adversary decision makers into taking action or inaction that creates favorable conditions for the deceiving force. This is usually ac ...

. The town was held by 300 Milanese soldiers, Tortona's own

militia A militia () is generally an army or some other fighting organization of non-professional soldiers, citizens of a country, or subjects of a state, who may perform military service during a time of need, as opposed to a professional force of r ...

and the men of its overall commander Obizzo Malaspina.

Siege

On 13 February, the

siege A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or a well-prepared assault. This derives from la, sedere, lit=to sit. Siege warfare is a form of constant, low-intensity conflict characteriz ...

began as the Imperials constructed siege works everywhere around Tortona to completely

blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are leg ...

it.

Henry the Lion Henry the Lion (german: Heinrich der Löwe; 1129/1131 – 6 August 1195) was a member of the Welf dynasty who ruled as the duke of Saxony and Bavaria from 1142 and 1156, respectively, until 1180. Henry was one of the most powerful German p ...

's men to the south of town and the Pavian militia to the east and north attacked and burned the defenseless town on 17 February. Nightfall and a

storm A storm is any disturbed state of the natural environment or the atmosphere of an astronomical body. It may be marked by significant disruptions to normal conditions such as strong wind, tornadoes, hail, thunder and lightning (a thunderstorm), ...

averted the capture of the citadel as well. Imperial slingers,

archer Archery is the sport, practice, or skill of using a bow to shoot arrows.Paterson ''Encyclopaedia of Archery'' p. 17 The word comes from the Latin ''arcus'', meaning bow. Historically, archery has been used for hunting and combat. In m ...

s and

crossbow A crossbow is a ranged weapon using an Elasticity (physics), elastic launching device consisting of a Bow and arrow, bow-like assembly called a ''prod'', mounted horizontally on a main frame called a ''tiller'', which is hand-held in a similar ...

men pelted the defending troops on the walls with projectiles as the siege army constructed

siege engine A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while oth ...

s. A rock thrown by a

mangonel The mangonel, also called the traction trebuchet, was a type of trebuchet used in Ancient China starting from the Warring States period, and later across Eurasia by the 6th century AD. Unlike the later counterweight trebuchet, the mangonel o ...

destroyed part of the fortifications and killed three armoured knights. The besiegers used an engine to bore a

tunnel A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube cons ...

to undermine one of the towers, but the defenders dug a counter-tunnel that collapsed the effort and killed some of the miners. Frederick then contaminated the garrison's

water supply Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes. Public water supply systems are crucial to properly functioning societies. Th ...

with

corpse A cadaver or corpse is a dead human body that is used by medical students, physicians and other scientists to study anatomy, identify disease sites, determine causes of death, and provide tissue to repair a defect in a living human being. Stud ...

s and burning

sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formul ...

and pitch. Finally, the garrison capitulated on 18 April out of thirst.

Aftermath

The garrison was placed under guard, the Tortonians banished from the place and the Germans and Pavians burned everything in the city, including the

grave A grave is a location where a dead body (typically that of a human, although sometimes that of an animal) is buried or interred after a funeral. Graves are usually located in special areas set aside for the purpose of burial, such as grav ...

s. The destruction accomplished little: the Tortonians re-entered on 1 May with Milanese help and rebuilt the city. Frederick celebrated his victory in Pavia on 24 April and was crowned

King of Italy King of Italy ( it, links=no, Re d'Italia; la, links=no, Rex Italiae) was the title given to the ruler of the Kingdom of Italy after the fall of the Western Roman Empire. The first to take the title was Odoacer, a barbarian military leader ...

with the

Iron Crown of Lombardy The Iron Crown ( lmo, Corona Ferrea de Lombardia; it, Corona Ferrea; la, Corona Ferrea) is a relic and may be one of the oldest royal insignia of Christendom. It was made in the Early Middle Ages, consisting of a circlet of gold and jewels fi ...

in St. Michael's Church. He then made his way to Rome, where he was crowned Holy Roman Emperor on 18 June.

References

Bibliography

* * {{cite book , editor-last1=Kedar , editor-first1=Benjamin Z. , editor-last2=Phillips , editor-first2=Jonathan , editor-last3=Riley-Smith , editor-first3=Jonathan , author-last=Loud , author-first=Graham A. , title=Crusades: Volume 13 , publisher=Ashgate , location=Farnham , year=2014 , isbn=978-1472441676