American Army Air Corps

During the First World War, Josiah Rowe's grandfather served as a pilot in the . At a base in Foggia, Italy, the Ninth Doctor ingratiated himself with the the CO, was in a photograph Josiah's grandfather took of his fellow pilots, and stole a Spad XIII. (PROSE: Have You Seen This Man?)

Behind the scenes
In the real world, the was active during the Second World War, not the first. No explanation for this discrepancy is given.