The Battle of Baku took place in August and September 1918 between the Ottoman–Azerbaijani coalition forces led by Nuri Pasha and Bolshevik–ARF Baku Soviet forces, later succeeded by the British–Armenian–White Russian forces led by Lionel Dunsterville, and saw Soviet Russia briefly re-enter the war. The battle took place during World War I, was a conclusive part of the Caucasus Campaign, but a beginning of the Armenian–Azerbaijani War.