He was one of 11 American[2] pilots who flew with RAF Fighter Command between 10 July and 31 October 1940, thereby qualifying for the Battle of Britain clasp to the 1939–45 campaign star.

[5]) Keough was the smallest pilot in the whole of the Royal Air Force, hence the nickname, and was just 4 ft 10 in (147 cm) tall.

He was credited with one shared kill: Dornier Do 17 bomber shot down on 15 September with Pilot Officer Mike Appleby and Flight lieutenant John Dundas.

He was posted to RAF Kirton in Lindsey in Lincolnshire on 18 September 1940 and was a founding member of No.

[6] On 15 February 1941, Keough was on a convoy-protection mission off Flamborough Head,[1] East Yorkshire.