A policeman sounds the air raid warning in London, reminding citizens to get to shelter, 1939.
IWM

A Red Army soldier stares upon the dead during The Siege of Leningrad, 1941.
Itar-Tass

London, September 1, 1939.
Getty

A boy in London wears a steel helmet for protection during The Blitz, 1940.
George Rodger

The London Auxilliary Firefighting Service trains in preparation for war, 1939.
National Archives

Parisians welcome Allied tanks into the city after its liberation. August 26, 1944.
Roger Viollet

Saying goodbye at Penn Station before being shipped off, New York, 1943.
Alfred Eisenstaedt

A wounded member of the 3rd Canadian Infantry Division receives first aid from medics of the Canadian Regimental Aid Post. Normandy, July, 1944.
Harold G. Aikman