A mobility kill (or M-kill) in armoured warfare refers to a weapon or vehicle that is immobilized, or the act of immobilizing such a target. Typically this term is used to refer to tanks and other armoured fighting vehicles that have their engines, tracks, or running gear damaged. Because of the mobile nature of modern warfare, such a vehicle is often effectively useless on the battlefield, but it may be salvaged, or repaired and brought back into action quickly.
It is claimed that the Wehrmacht lost more Panther tanks as mobility kills than as catastrophic kills in World War II.[1]