The Battle of the Seelow Heights (), was a part of the Seelow-Berlin Offensive Operation (16 April-2 May 1945), one of the last assaults on large entrenched defensive positions of World War II. It was fought over three days, from 16–19 April 1945. Close to one million Soviet soldiers of the 1st Belorussian Front (including 78,556 soldiers of the Polish 1st Army), commanded by Marshal Georgi Zhukov, attacked the position known as the "Gates of Berlin". They were opposed by about 110,000 soldiers of the German 9th Army, commanded by General Theodor Busse, as part of the Army Group Vistula.