US Navy Stealth Nuclear Submarines - The Silent Killers in Action
A howitzer is a type of artillery piece characterized by a relatively short barrel and the use of comparatively small propellant charges to propel projectiles over relatively high trajectories, with a steep angle of descent.
A self-propelled howitzer is mounted on a tracked or wheeled motor vehicle. In many cases, it is protected by some sort of armor so that it superficially resembles a tank. This armor is designed primarily to protect the crew from shrapnel and small arms fire, not anti-armor weapons.
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