 Complete the following phrase:  At the outbreak of the Second World War in 1939, Harris took command of No. 5 Group RAF in England, and in February 1942 was appointed head of Bomber Command. He retained that position for the rest of the war. In the same year, the British Cabinet agreed to the area bombing of German cities. Harris was given the task of implementing Churchills policy and supported the development of tactics and technology to perform the task more effectively. Harris assisted British Chief of the Air Staff Marshal of the Royal Air Force Charles Portal in carrying out the United Kingdoms most devastating attacks against the German infrastructure and population, including the 