The book tells about an unknown page in the history of the Ukrainian national liberation struggle of 1917 - 1921 - the war of the Ukrainian People's Republic with the White Guard Armed Forces of Southern Russia, General A. Denikin. On the basis of documents found in the archives, a wide range of published sources covered in detail the course of hostilities during the Ukrainian-White Guard war in autumn 1919, showed the impact of political processes on military events, revealed the causes of military defeat in this war, analyzed its significance for Ukrainian national -liberation struggles and civil war in Russia. For the first time, documents of the state and military leadership of the Ukrainian People's Republic, the Ukrainian Galician Army, and the command of the Denikin Armed Forces of Southern Russia are published. its armed forces.