Men of the German Engineers Corps cross a river which is swollen after the first autumn rains, to strengthen bridges linking the German positions on the central front in Russia. (Photo by Keystone/Getty Images). October 1942

Red Army men break into a populated area north-west of Stalingrad. The Nazis had penetrated the city in September but the Russians counter-attacked in a pincer movement three weeks later and subsequently drove towards Kharkov in the north-west. (Photo by Hulton Archive/Getty Images). December 1942

Soviet machinegunners fire at Nazis who had barricaded themselves into houses during street fighting on the outskirts of Stalingrad. (Photo by Hulton Archive/Getty Images). January 1943

German soldiers fire the last shots in their mopping up operations in the main streets of Rostov. It was their second conquest of the city, where the tenacious Russian snipers kept them occupied even after the town had fallen. (Photo by Keystone/Getty Images). 24th July 1942

German soldiers surrendering to the Russians in Stalingrad, the soldier holding the white flag of surrender is dressed in white so that there could be no doubt of his intentions, a Russian soldier is on the right of the photograph. (Photo by Keystone/Getty Images). January 1943

Armed with light machine guns, Soviet troops attack the German forces in the vicinity of the Red October plant in Stalingrad. (Photo by Hulton Archive/Getty Images). 26th November 1942

Russian snipers fighting on the Leningrad front during a blizzard. (Photo by Hulton Archive/Getty Images). 1943

Russian troops in the treaty room at the Chancellery in Berlin, where the huge chandeliers hang nearly to the floor. (Photo by Express/Express/Getty Images). 1945

A dejected German Grenadier carrying a machine gun on his shoulder in front of a building on fire during the German retreat in Russia. (Photo by Keystone/Getty Images). 1944

Three German soldiers covered in snow and ice during winter on the Eastern front. (Photo by Hulton Archive/Getty Images). 27th March 1944

Red Army soldiers aiming their weapons at a German soldier emerging from a captured Nazi dugout who raises his arms in surrender. (Photo by Picture Post/Hulton Archive/Getty Images). 13th June 1942

German soldiers fleeing from the ruins of a Russian village. (Photo by Picture Post/Hulton Archive/Getty Images). 13th June 1942

A group of the Russian guerrilla fighters responsible for attacking the German army during their invasion of western Russia during World War II. (Photo by Eric Harlow/Keystone/Getty Images). Circa 1941

Two young German soldiers on the Russian front with a damaged bust of Stalin. (Photo by Keystone/Getty Images). Circa 1941

Exhausted German soldiers resting by the roadside on the Eastern Front. (Photo by Keystone/Getty Images). 1941

Hooded and camouflaged spotters of a Soviet anti-aircraft gun detachment, keep watch for enemy planes in a sunken look out post at the approach to Leningrad. (Photo by Keystone/Getty Images). September 1941

Soviet guerrillas giving their pledge to defend their homeland against the German army. (Photo by Hulton Archive/Getty Images). Circa 1941

Russian guerrillas investigate the wreckage of a crashed German warplane. (Photo by Hulton Archive/Getty Images). Circa 1941

Carl Gustaf Emil Mannerheim (1867–1951), Commander-in-Chief of Finland's Defence Forces, watches operations in the Leningrad sector during World War II, circa 1941. (Photo by Three Lions/Hulton Archive/Getty Images)