The Georgian-Armenian War is a border war fought in 1918 between the Democratic Republic of Georgia and the Democratic Republic of Armenia over the parts of the disputed provinces of Lori, Javakheti, and Borchalo district, which had been historically bicultural Armenian-Georgian territories, but had been largely populated by Armenians in the 19th century.By the end of the First World War, some of these territories are occupied by the Ottomans.

When they abandon the region, both Georgians and Armenians claim control.

The dispute degenerates into armed clashes on December 7, 1918.

The hostilities continued with varying success until December 31 when a British-brokered ceasefire is signed, leaving the disputed part of the Borchalo district under the joint Georgian-Armenian administration which is to last until the establishment of the Soviet rule in Armenia in 1920.