He is rightly considered to be the ‘Father of the Royal Air Force’, but the first stint by Sir Hugh — later Lord — Trenchard as Chief of the Air Staff was a brief, and fraught, affair. Correspondence from 100 years ago demonstrates the extent of the animosity that led to Trenchard’s resignation
15 May 1925 First of the Special Reserve squadrons, part of the Royal Auxiliary Air Force, formed: No 502 Squadron at Aldergrove, flying the Vickers Vimy.
1 October 1925 Cambridge University Air Squadron, the first UAS, formed. 29 October 1925 Observer Corps (later Royal Observer Corps) formed to identify and track aircraft movements over the UK. It would come into its own during the Second World War.
17-19 June 1926 Major air operations by Nos 1 and 30 Squadrons — flying Sopwith Snipes and DH9As respectively — against Sheikh Mahmud and his followers in Iraq, following insurrections against British rule.