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Wikipedia[2] and multiple WWII histories date the Schwerer Gustav’s deployment against Sevastopol to June 1942, during the Axis siege of the city.Germany's 1,350-tonne Krupp-built railway gun Schwerer Gustav fired roughly 48 shells at the Soviet fortress city of Sevastopol in June 1942, its only combat use in the war. Trains as War Machines features the gun as an extreme case of rail warfare.
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