The Volunteer Army in South Russia became the most prominent and the largest of the various and disparate White forces. Starting off as a small and well-organized military in January 1918, the Volunteer Army soon grew. The Kuban Cossacks joined the White Army and conscription of both peasants and Cossacks began. In late February 1918, soldiers under the command of General Aleksei Kaledin were forced to retreat from Rostov-on-Don due to the advance of the Red Army. In what became known as the Ice March, they traveled to Kuban in order to unite with the Kuban Cossacks, most of whom did not support the Volunteer Army. In March, men under the command of General Viktor Pokrovsky joined the Volunteer Army, increasing its membership to , and by June to . In 1919 the Don Cossacks joined the Army. In that year between May and October, the Volunteer Army grew from to soldiers and was better supplied than its Red counterpart. The White Army's rank-and-file comprised active anti-Bolsheviks, such as Cossacks, nobles, and peasants, as conscripts and as volunteers.