Hello, I'm trying to make sense of my gt-grandfather's service history and I was hoping someone could help me understand it. The source I have has him a 2Lt in the Lincolnshire Regiment (militia) from 1905 to 1908, when he resigned his commission as a captain. In 1909 he apparently became a 2Lt in 5th (Special Reserve) Battalion, Royal Fusiliers (City of London Regiment), becoming a Lt in 1910. In August 1912 he becomes a 2Lt for the third time and is listed as an 'Officer, Royal Fusiliers (City of London Regiment)'. However, on the same day he is 'Appointed a flying officer, RFC' and as far as I'm aware his nominal regiment never hear from him again. I'm confused because: 1) This looks odd. Why was he a 2Lt three times? 2) I'd assumed the militia and the special reserve were strictly part-time formations, but were their officers ever full-time? I ask because in a 1911 census he gave his profession as 'army officer'. 3) Did he in fact not become a regular officer until August 1912, and only then to join the RFC?