After the Bolshevik Revolution of 1917, the ensuing Civil War produced acute food shortages in southwestern Russia. Wartime devastation was compounded by two successive seasons of drought, and by 1920 it was clear that a full-scale famine was under way in the Volga River Valley, Crimea, Ukraine, and Armenia. Conditions were so desperate that in early 1920 the Soviet government sent out a worldwide appeal for food aid to avert the starvation of millions of people.