1918 First victory of Red Army over the Kaiser's German troops near Narva and Pskov. In honor of this victory, the date is celebrated from 1923 onward as "Red Army Day"; it is renamed Defender of the Fatherland Day after the fall of the Soviet Union in 1991, and is colloquially known as "Men's Day".
1920 Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later.
1921 The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
1942 World War II: Second Battle of Kharkov: in eastern Ukraine, Red Army forces under Marshal Semyon Timoshenko launch a major offensive from the Izium bridgehead, only to be encircled and destroyed by the troops of Army Group South two weeks later.
1943 World War II: Red Army troops re-enter Kharkov.
1944 World War II: the Red Army enters Tallinn.
1944 World War II: The Soviet Red Army enters Hungary.
1945 Liberation of the Budapest ghetto by the Red Army.