Firepower-kill meaning

(military, slang) The damage inflicted by a weapon on a vehicle that destroys its weapon systems, or substantially reduces its ability to deliver weapons accurately.

(military, slang) A vehicle or vehicles that have their guns or missile system damaged under fire; when damaged, vents open to channel ignited propellants and explosives away from the crew cabin. The firepower-killed tank can then return to a maintenance center with its crew intact.