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

A woman in Manhattan reacts to news of President John F. Kennedy’s assassination. November 22, 1963.
Stan Wayman

London, September 1, 1939.
Getty

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

A German prisoner of war lights the cigarette of a British soldier, World War I.
Nationaal Archief