sentences:  Following World War II, for instance, the United States occupation authorities in Germany found that 81 percent of all houses in the American Zone had been destroyed or damaged in the fighting.The question of under what circumstances the destruction of civilian dwellings becomes a legitimate military tactic remains controversial, and recent international conventions have agreed that civilian houses, dwellings, and installations shall not be made the object of attack, except if they are used mainly in support of the military effort.However, there are also many non-combat situations in which house demolition has been used.