Peter Dvornikov was called to the front in July 1941. He fought in the Red Banner Guards Nezhinsky Regiment. He was in the army and served on various fronts from July 1941 to July 1946. He commanded a self-propelled battery. He took part in the liberation of Poland, Czechoslovakia, Hungary, and Germany. He was awarded orders of the Patriotic War 1st and 2nd degrees, medals For the Capture of Berlin, For the Liberation of Prague, For the Victory over Germany in the Great Patriotic War of 1941-1945. He went from Sergeant to Major of the Soviet Army.