The Makhnovshchina (Ukrainian: Махновщина, romanized: Makhnovshchyna, IPA: [mɐxˈnɔu̯ʃtʃɪnɐ]) was a mass movement to establish anarchist communism during the Ukrainian War of Independence of 1917–1921. Named after Nestor Makhno, the commander-in-chief of the Revolutionary Insurgent Army of Ukraine, its aim was to create a system of free soviets that would manage the transition towards a stateless and classless society. It controlled territory in southern and eastern Ukraine.
The Makhnovist movement first gained ground in the wake of the February Revolution, when it established a number of agricultural communes in Makhno's home town of Huliaipole. After siding with the Bolsheviks during the Ukrainian–Soviet War, the Makhnovists were driven underground by the Austro-German invasion and waged guerrilla warfare against the Central Powers throughout 1918. After the insurgent victory at the Battle of Dibrivka, the Makhnovshchina came to control much of Katerynoslav province and set about constructing anarchist-communist institutions. A Regional Congress of Peasants, Workers and Insurgents was convened to organise the region politically and economically, with a Military Revolutionary Council being established as the movement's de facto executive organ.