The Battle of Kara Killisse (Lit. Black church, Turkish: Karakilise Muharebesi) was a battle on the Caucasus front in July 1915 after the Battle of Manzikert. In Russian historical literature, this engagement is considered as a part of "Alashkert defensive operation" (9 July-3 August). In the summer of 1915 the Russians attacked Turkish positions northeast of lake Van but they underestimated the size of their enemy. The were defeated but the pursuing Turks spread out and the Russian general Yudenich send out some 20.000 reinforcements mostly Cossack units to encircle them. The Russians succeeded only partially. The Turks lost some guns, large provisions and 10.000 killed and wounded and 6.000 became prisoners. Due to difficulties the Russians could not gain total advantage and retreated from the town of Van and Turks occupied it on 3 August.