In 1920 Budyonny's Cavalry Army took part in the defence from Poland during the Polish-Bolshevik War, at first with remarkable success. The 1st Cavalry Army pushed Polish forces out of Ukraine and broke through Polish southern frontlines, but later was bogged down at Lvov. This in turn led to a heavy defeat of the rest of the Bolshevik forces in the Battle of Warsaw. When Budyonny's Cavalry finally joined the battle it was also soundly defeated in the Battle of Komarów, known as the last great cavalry battle in history. At this point, the 1st Cavalry Army's morale and discipline were at a low point and robbery and violence against the civilian population became commonplace. The 1st Cavalry Army also became known for periodic outbreaks of murderous anti-semitism.