sentences:  Armored bulldozers or tanks may be used to knock out the walls of a building, causing it to collapse.Combat engineering forces may use explosives to demolish a building, or it may simply be destroyed through direct bombardment by aircraft or artillery.The end result is not always the total demolition of a building—the walls may remain standing in the event of a fire, for instance—but it does achieve the main objective of making the building unfit for habitation.