The Battle of Krivolak [in Bulgarian: Криволашко сражение (1915)] was a World War I battle, fought between 21 October and 22 November 1915. The battle was fought in the initial stage of the Macedonian campaign, in the Balkans Theatre. On October 21, Bulgarian troops attacked the French-held positions near the Strumica rail station, at the time part of the Kingdom of Serbia (present day Republic of Macedonia), starting the battle. Fighting continued until November 22, when two Serbian divisions failed to capture Skopje, thus rendering the continuation of offensive Entente operations dangerous and enabling the French to evacuate their forces from the region.