800 mm shell, used by Schwerer Gustav and Dora. Largest gun in history. - 9GAG

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Why did a lot of WW2 military vehicles have a five point star painted on them? - Quora

Heard you like guns. This is the 800mm Schwerer Gustava, largest caliber rifled weapon ever used in combat. - 9GAG

1945 - The 12' artillery shells fired by the world's biggest cannon, the Schwerer Gustav. : r/interestingasfuck

In World War II, who was responsible for the shelling of Mainila? Why was this done? - Quora

Y'all be talking about your big guns. Meet Schwerer Gustav, and his 800mm sausage cannon : r/WorldofTanks

War - Chan4Chan

War - Chan4Chan

Schwerer Gustav, the 800mm railway gun - 9GAG

What is the largest shell used during World War II? - Quora