The Battle of Berlin (November 1943 to March 1944) was a series of attacks on Berlin by RAF Bomber Command along with raids on other German cities to keep German defences dispersed. Air Chief Marshal Sir Arthur Harris, AOC-in-C (Air Officer Commanding-in-Chief) Bomber Command, believed that "We can wreck Berlin from end to end if the USAAF come in with us. It will cost us between 400 and 500 aircraft.