Ukrainian War of Independence: The Polonsky conspiracy is initiated, with an attempt to assassinate the high command of the Revolutionary Insurgent Army of Ukraine.

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 Polonsky conspiracy, also known as the Polonsky plot or Polonsky affair, was an attempt by Ukrainian Bolsheviks to overthrow the Makhnovshchina during the autumn of 1919.

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.

December 4 is the 338th day of the year in the Gregorian calendar; 27 days remain until the end of the year.