The 9th Guards Army attacked the northwestern road out of Vienna in conjunction with the 6th Guards Tank Army and broke German resistance in early April. On 13 April, the army helped capture Vienna.[5] The army then fought in the Prague Offensive, where it captured Znojmo on 8 May in conjunction with the 7th Guards Army. It also captured Retz and Písek, ending the war on the Elbe.[1][6]