 During the operation to occupy Crimea, he was appointed commander of the Crimean corps by the "Council of Revolutionary Rebels of Ukraine".On November 8, 1920, the RIAU's Crimean Corps crossed the Sivash and reached the Lithuanian Peninsula in the rear of Pyotr Wrangel's fortifications at Perekop.On November 9, in a battle near Lake Bezymyannoye, Karetnik's Crimean corps defeated the five thousandth horse corps of General Barbovich.