Answer
Makhno's forces won the Battle of Peregonovka against the White Army in Ukraine. This battle took place on May 26, 1919, and was one of the first major victories for the Makhnovists. The White Army was defeated by the Makhnovists, who were able to capture a large number of weapons and supplies. This victory helped to establish the Makhnovists as a major force in the Ukrainian Civil War.