By 1911, the Army had been moved to Erzincan in northeastern Anatolia, and with the onset of World War I, it was moved to Erzurum. During the war, it fought against the Russian Caucasus Army, Armenian volunteer units and behind the lines dealt with the Armenian Resistance within its designated area. During this period, the Battle of Sarikamish, Battle of Koprukoy and the Battle of Erzurum were significant engagements. The army's headquarters was moved to Susehir (a town near Sivas) after the disastrous Battle of Erzurum, and by late 1916 the army lacked any offensive capability. After the Russian Revolution, the Russian Caucasus Army disintegrated.