No.11 Group was a part of which air force that emerged as the largest air force in the world in 1918?
Royal Air Force The Royal Air Force (RAF) is the United Kingdom's aerial warfare force. Formed towards the end of the First World War on 1 April 1918, it is the oldest independent air force in the world. Following victory over the Central Powers in 1918 the RAF emerged as, at the time, the largest air force in the world. Since its formation, the RAF has taken a significant role in British military history, in particular, playing a large part in the Second World War where it fought its most famous campaign, the Battle of Britain.
Feldflieger Abteilung Feldflieger Abteilung (FFA, Field Flying Company) was the title of the pioneering field aviation units of what became the "Luftstreitkräfte" (German air service) by October 1916, during World War I.