Allied ships evacuated about 40,000 of Denikin's men from Novorossiysk to the Crimea, without horses or any heavy equipment, while about 20,000 men were left behind and either dispersed or captured by the Red Army. Following the disastrous Novorossiysk evacuation, Denikin stepped down and the military council elected Wrangel as the new Commander-in-Chief of the White Army. He was able to restore order to the dispirited troops and reshape an army that could fight as a regular force again. It remained an organized force in the Crimea throughout 1920. After Moscow's Bolshevik government signed a military and political alliance with Nestor Makhno and the Ukrainian anarchists, the Insurgent Army attacked and defeated several regiments of Wrangel's troops in southern Ukraine, forcing him to retreat before he could capture that year's grain harvest. Stymied in his efforts to consolidate his hold, Wrangel then attacked north in an attempt to take advantage of recent Red Army defeats at the close of the Polish–Soviet War of 1919–1920. The Red Army eventually halted the offensive, and Wrangel's troops had to retreat to Crimea in November 1920, pursued by both the Red and Black cavalry and infantry. Wrangel's fleet evacuated him and his army to Constantinople on 14 November 1920, ending the struggle of Reds and Whites in Southern Russia. After the defeat of Wrangel, the Red Army immediately repudiated its 1920 treaty of alliance with Nestor Makhno and attacked the anarchist Insurgent Army; the campaign to liquidate Makhno and the Ukrainian anarchists began with an attempted assassination of Makhno by Cheka agents. Anger at continued repression by the Bolshevik Communist government and at its liberal use of the Cheka to put down anarchist elements led to a naval mutiny at Kronstadt in March 1921, followed by peasant revolts. Red Army attacks on the anarchist forces and their sympathisers increased in ferocity throughout 1921. Siberia and the Far East (1920–22) In Siberia, Admiral Kolchak's army had disintegrated. He himself gave up command after the loss of Omsk and designated Gen. Grigory Semyonov as the new leader of the White Army in Siberia. Not long afterward, Kolchak was arrested by the disaffected Czechoslovak Corps as he traveled towards Irkutsk without the protection of the army and was turned over to the socialist Political Centre in Irkutsk. Six days later, the regime was replaced by a Bolshevik-dominated Military-Revolutionary Committee. On 6–7 February Kolchak and his prime minister