The 9th Guards Army was a field army of the Red Army during World War II, which fought in the Vienna Offensive and the Prague Offensive at the end of the war. The army was formed in January 1945 and included airborne divisions converted into infantry. Postwar, the army headquarters became Soviet airborne headquarters.

The Vienna offensive was an offensive launched by the Soviet 2nd and 3rd Ukrainian Fronts in order to capture Vienna, Austria, during World War II. The offensive lasted from 16 March to 15 April 1945. After several days of street-to-street fighting, the Soviet troops captured the city.