Before the war, Russia established a volunteer system to be used in the Caucasus Campaign. In the summer of 1914, Armenian volunteer units led by Andranik Ozanian were established under the Russian Armed forces. As the Russian Armenian conscripts had already been sent to the European Front, this force was uniquely established from Armenians that were neither Russian subjects nor obliged to serve. The Armenian units were credited with no small measure of the success gained by the Russian forces, as they were natives of the region, adjusted to the climatic conditions, familiar with every road and mountain path, and had real incentives to fight.