Ukrainian War of Independence: The Revolutionary Insurgent Army of Ukraine occupies Yekaterinoslav and seizes seven airplanes from the UPRAF, establishing an Insurgent Air Fleet.

The Ukrainian War of Independence, also referred to as the Ukrainian–Soviet War in Ukraine, lasted from March 1917 to November 1921 and was part of the wider Russian Civil War. It saw the establishment and development of an independent Ukrainian republic, most of which was absorbed into the Ukrainian Soviet Socialist Republic between 1919 and 1920. The Ukrainian Soviet Socialist Republic was one of the constituent republics of the Soviet Union between 1922 and 1991.

The Revolutionary Insurgent Army of Ukraine, also known as Makhnovtsi, named after their founder Nestor Makhno, was an anarchist army formed largely of Ukrainian peasants and workers during the Russian Civil War. They protected the operation of "free soviets" and libertarian communes by the Makhnovshchina, an attempt to form a stateless anarcho-communist society from 1918 to 1921 during the Ukrainian War of Independence.

Dnipro is Ukraine's fourth-largest city, with about one million inhabitants. It is located in the eastern part of Ukraine, 391 km (243 mi) southeast of the Ukrainian capital Kyiv on the Dnipro River, from which it takes its name. Dnipro is the administrative centre of Dnipropetrovsk Oblast. It hosts the administration of Dnipro urban hromada. Dnipro has a population of 968,502.

The Air Fleet of the UPR was the air force of the Ukrainian People's Republic in 1917–1921.