Long ago christened the "King of Battle", heavy guns are always evolving to keep pace with warfare. From catapults to cannon, ballista to battleships, gunpowder to giant superguns, we chart the evolution and the sheer power of this mind-shattering dynasty of destruction.

When a soldier is pinned down, sometimes he can only rely on the weapons he carries with him. He might be facing a tank, he might be pinned down by a machine gun nest, and he might take heat from planes and choppers. When that moment comes, hand grenades and RPG's become a soldier's best friend.