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Battle of Manzikert
August 26, 1071· Battle· Middle East & Africa
Well documentedSolid records, physical evidence or scientific consensus.
The Seljuk Turks under Sultan Alp Arslan defeated and captured Byzantine Emperor Romanos IV Diogenes in eastern Anatolia in 1071.
See it on the Battles & Wars map →What happened
Romanos IV marched east with a large but mixed army, perhaps 40,000 or more, to secure Byzantium's Armenian frontier; some mercenary units deserted beforehand. Near Manzikert (modern Malazgirt, Turkey), Seljuk horse archers drew his army into a long pursuit. As it turned back at dusk, Andronikos Doukas, a political rival of the emperor, withdrew the rearguard, and the line fell apart. Romanos was captured, treated with courtesy, and released after agreeing to a treaty.
Why it matters
Byzantine civil war followed, and Turkish groups moved into Anatolia almost unopposed, founding the Sultanate of Rum. Losing that heartland led to Byzantium's appeal to the West and the Crusades.
How we know
Byzantine accounts by Michael Attaleiates, who was there, and Michael Psellos, plus Arab and Persian chroniclers; their figures for army sizes and losses vary widely.
Still debated
Losses in the battle itself were probably modest; historians debate whether the defeat or the civil wars after it did more to lose Anatolia.
Connections (2)
▸Battle of Manzikert prompted the Byzantine appeal behind The CrusadesWell documented
The connection
After Manzikert, Turkish groups took most of Anatolia, reaching Nicaea, close to Constantinople. Emperor Alexios I Komnenos sent envoys to Pope Urban II in 1095 asking for Western soldiers. Urban answered at Clermont that November by calling for an armed pilgrimage to Jerusalem, which became the First Crusade.
When and how
Anatolia after 1071; Council of Piacenza, March 1095, and Council of Clermont in France, November 1095; Alexios I and Urban II.
How we know
Western chroniclers record Byzantine envoys at Piacenza, and Alexios's daughter Anna Komnene wrote about the Turkish threat and the crusaders' arrival.
Debates and open questions
Alexios likely wanted mercenaries, not a mass movement aimed at Jerusalem; how much Urban's call was about helping Byzantium versus papal and religious aims is debated.
▸Battle of Manzikert began the Byzantine decline that ended in Fall of ConstantinopleMostly agreed
The connection
Losing central Anatolia stripped Byzantium of its main recruiting ground and tax base. The empire partly recovered under the Komnenos emperors, but was weakened further by the Fourth Crusade's sack of Constantinople in 1204 and by Ottoman expansion. When the Ottomans took the city in 1453, the empire was little more than its capital.
When and how
From Manzikert in eastern Anatolia, 1071, to Constantinople (now Istanbul), May 29, 1453.
How sure are we?
The territorial losses are well documented; treating 1071 as the start of a single decline is an interpretation that many historians now challenge.
Debates and open questions
Many historians argue the 1100s revival shows 1071 was not fatal, and that the 1204 sack did more lasting damage than Manzikert.