From 1948 until 1951, he worked at the Air Historical Branch of the
Air Ministry and received his DPhil from Oxford in April 1951. He was an Official Military Historian to the
Cabinet Office between 1951 and 1958. During this time, he and his co-author, Sir
Charles Webster, wrote a four-volume official history of the RAF's strategic air offensive against Germany. This was part of the official
History of the Second World War series. In 1963, he was invited to give the
Lees Knowles Lecture and lectured on
The Strategic Air Offensive. From 1958 to 1960, he was deputy director of studies at the
Royal Institute of International Affairs. He left to become Director of the
Imperial War Museum (IWM), a post he held from 1960 to 1982. Frankland was appointed a
Commander of the Order of the British Empire (CBE) in the
1976 Birthday Honours and appointed
Companion of the Order of the Bath (CB) in the
1983 New Year Honours. ==Bibliography==