In Southern Italy, after small-scale bombings by the RAF (more frequent than in the north), USAAF started its bombing campaign in December 1942. The bombings mostly targeted harbour facilities, marshalling yards, factories and airports, but the inaccuracy of the attacks caused extensive destruction and civilian casualties; among the cities hit the hardest were Naples (6,000 casualties), Messina (more than one third of the city was destroyed, and only 30% remained untouched), Reggio Calabria, Foggia (thousands of casualties), Cagliari (416 inhabitants were killed in the bombings of February 1943, 80% of the city was damaged or destroyed), Palermo, Catania and Trapani (70% of the buildings were damaged or destroyed).