42cm 'Big Bertha' and German Siege Artillery of World War I

In the early days of World War I, Germany unveiled a new weapon – the mobile 42cm (16.5 inch) M-Gerät howitzer. At the time, it was the largest artillery piece of its kind in the world and a closely guarded secret. When war broke out, two of the howitzers were rushed directly from the factory to Liege where they quickly destroyed two forts and compelled the fortress to surrender. After repeat perf...