Stymied in his efforts to consolidate his hold, Wrangel then attacked north in an attempt to take advantage of recent Red Army defeats at the close of the Polish–Soviet War of 1919–1920. The Red Army eventually halted this offensive, and Wrangel's troops had to retreat to Crimea in November 1920, pursued by both the Red and Black cavalry and infantry. Wrangel's fleet evacuated him and his army to Constantinople on 14 November 1920, ending the struggle of Reds and Whites in Southern Russia.