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Close combat is the USMC term for Hand to hand combat.
Close Combat is also the name of a series of five computer games by Atomic Games.

The term for hand-to-hand combat in the United States Army is Combatives.

CQB is an acronym for close quarters battle, such as that which occurs in urban warfare.

CQC is Close Quarters Combat, virtually the same thing as CQB

The scientific-based Chinese martial art of Wing Chun specializes in close combat or "in-fighting."