Task: Question Understanding
Input (English): Context : Ian Willoughby Bazalgette, VC, DFC (19 October 1918 -- 4 August 1944) was born in Calgary, Alberta, Canada and while serving in the Royal Air Force was awarded the Victoria Cross, the highest and most prestigious award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces. 
Question : In what military branch did Ian Willoughby Bazalgette serve?
Output (English): military branch