The self-propelled artillery system was called Crusader, and the armed scout helicopter was called Comanche.

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The Army's C-RAM (Counter Rocket, Artillery and Mortar) system, for example, which is used to protect American bases in Afghanistan, can fire on its own, using its six-barrel gun to blow up incoming mortars.

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The Crusader was scheduled to go into service in 2008 as the Army's next generation of mobile artillery to replace the aging Paladin system.

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