The Battle of Bash Abaran (Armenian: Բաշ Աբարանի ճակատամարտ Bash Abarani chakatamart, Turkish: Baş-Abaran Muharebesi) was a battle of Caucasus Campaign of World War I that took place in the vicinity of Bash Abaran, in 1918. The Armenian victories at Bash Abaran, Sardarabad and Karakilisa, halted the Ottoman invasion of Eastern Armenia and were instrumental in allowing the formation of the short-lived First Republic of Armenia.