First Republic of Armenia
The First Republic of Armenia declared war on the Ottoman Empire. In early May 1918, the Ottoman army faced the Armenian Corps of Armenian National Councils, which soon declared the First Republic of Armenia. The Ottoman army captured Trabzon, Erzurum, Kars, Van, and Batum. The conflict led to the Battle of Sardarapat, the Battle of Kara Killisse (1918), and the Battle of Bash Abaran.