The Seljuks Capture a Byzantine Emperor at Manzikert

On 26 August 1071, an imperial army under Byzantine Emperor Romanos IV Diogenes clashed with the forces of Seljuk Sultan Alp Arslan near the eastern fortress town of Manzikert. Romanos aimed to put an end to persistent Turkic incursions across the eastern frontiers and reassert imperial control over key borderlands. Years earlier, the Seljuks had demonstrated their growing power by taking the regional bastion of Ani in 1064. To reverse these territorial setbacks, Romanos gathered a large and diverse force, estimated by modern historians at anywhere from about 40,000 to 70,000 men, combining professional core regiments with Norman, Frankish, Turkic, and Armenian soldiers.

The imperial campaign was undermined before the main engagement even began. Misjudging the proximity of Alp Arslan's army, a mobile cavalry force that modern estimates put at roughly half the size of his own, Romanos split his command near Lake Van. He dispatched General Joseph Tarchaniotes with about half the army toward Khliat, while he marched with the remainder to secure Manzikert. Tarchaniotes' force subsequently disappeared from the theatre without aiding the emperor; Byzantine sources make no mention of an engagement with the Sultan, while Islamic chronicles claim Alp Arslan defeated them. Romanos was left with only about half of his army and had no accurate intelligence regarding the enemy's whereabouts.