Kiev offensive (1920)
The 1920 Kiev offensive (or Kiev expedition, Polish: wyprawa kijowska) was a major part of the Polish–Soviet War. It was an attempt by the armed forces of the recently established Second Polish Republic led by Józef Piłsudski, in alliance with the Ukrainian People's Republic led by Symon Petliura, to seize the territories of modern-day Ukraine which mostly fell under Soviet control after the October Revolution as the Russian Soviet Republic.