Both sides used local asymmetrical forces in the region. On the Allied side were Arabs who participated in the Arab Revolt and the Armenian militia who participated in the Armenian Resistance during the Armenian Genocide; along with Armenian volunteer units, the Armenian militia formed the Armenian Corps of the First Republic of Armenia in 1918. In addition, the Assyrians joined the Allies following the Assyrian genocide, instigating the Assyrian war of independence. The theatre covered the largest territory of all theatres in the war.