Isthmus of Perekop
Having secured peace on the Western front, the Bolsheviks immediately moved to crush the remnants of the White Movement. After a final offensive on the Isthmus of Perekop, the Red Army overran Crimea. Wrangel evacuated the Volunteer Army to Constantinople in November 1920. After its military and political defeat, the Directorate continued to maintain control over some of its military forces; in October 1921, it launched a series of guerrilla raids into central Ukraine that reached as far east as the modern Kiev Oblast ("Kiev province"). On November 4, the Directorate's guerrillas captured Korosten and seized a cache of military supplies. But on November 17, 1921, this force was surrounded by Bolshevik cavalry and destroyed.