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Both guns remained on the Eastern Front but were not used in combat again. Dora was set up to be deployed against Stalingrad, though it cannot be confirmed whether it fired against its target or not. The gun was manned by a crew of over 1400 men, 250 to assemble the weapon, two anti-aircraft battalions to protect it, and the rest to load and fire the weapon. The Schwerer Gustav entered combat during the German siege of Sevastopol in June 1942. Instead, the guns were deployed to the Eastern Front against the Soviet Union. The guns were originally designed to be deployed against the French Maginot Line though the Blitzkrieg rendered that mission obsolete.
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The guns also had a range of over 24 miles. The Schwerer Gustav and its sister gun Dora were the two largest artillery pieces every constructed in terms of overall weight (1350 tonnes) and weight of projectiles (15,700 pounds), while it's 800mm rounds are the largest ever fired in combat.
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