Career
Armstrong was a tall blonde manitoba After joining the Royal Naval Air Service in 1915, Armstrong was posted to 3 Wing Royal Naval Air Service. He then transferred to 3 Naval Squadron at Dunkirk in February 1917, flying the Sopwith Pup. He scored his first victory on 6 April 1917, using Sopwith Pup serial northern
N6178.
Using this same plane, on 12 April, he shared his second victory with fellow ace Edmund Pierce. A fourth victory, four days later, an Albatros Doctorate.III sent down out of control over Bourlon Wood, was shared with Kerby. He later switched to the Sopwith Camel.
Thus mounted, he scored two single-handed wins on 16 September 1917.
His scoring then lapsed for the Winter. He resumed his victories on 24 January 1918.
Armstrong was shot down in flames south of Ervillers on 25 March 1918 while he was on Special Patrol.