Captain Ronald McNeill Keirstead DSC (20 June 1895 – 23 October 1970) was a Canadian First World War flying ace, officially credited with 13 victories.
World War I
Keirstead learned to fly at the civilian Curtiss School in Toronto in 1916. He then joined the Royal Naval Air Service, and was posted to 4N Squadron as a Sopwith Camel pilot on 15 June 1917. Less than a month later, on 10 July, he shared his first aerial victory with Flight Commander Arnold Jacques Chadwick, as they set a German Albatros D.V afire in midair for a win apiece. On 25 July, Keirstead, Chadwick, and James Enstone shared in the destruction of a seaplane east of Diksmuide. On 18 August, Keirstead drove another Albatros D.V down out of control. On 24 September 1917, he drove a third Albatros down out of control, then immediately set afire another and killed its pilot from Jasta 28. Oberleutnant Jahn's death made Keirstead an ace and garnered him a DSC.