sentences:  But despite the rise in manpower, Wrangel was unable to undertake a successful offensive towards Moscow or break out of his Crimean stronghold.A raid into the Kuban area in August 1920 under the command of General Sergei Georgievich Ulagay failed to expand White-held territory.The final assault on the Crimea by the Bolshevik re-constituted Southern Front (early November, 1920) under the command of Mikhail Frunze proved successful in defeating the last great White threat to the Reds.