 A force of Bristol Blenheim light bombers of the Royal Air Force based on the island of Malta attacked in the hours before dawn, mainly targeting industries in the eastern part of the city (because of the presence of fuel reserves and refineries) and the area near the main railway station.The largest raid was on 4 August 1943, by 400 American Boeing B-17 Flying Fortress aircraft of the Northwest African Strategic Air Force (NASAF) which targeted the Axis submarine base at Naples.The Church of Santa Chiara was destroyed in this raid but was later rebuilt.