[1] Although born in the British West Indies, he returned to England to serve in the Royal Flying Corps.
After his successful career in combat, he spent a short time at home before returning to the colours.
[2] McDonald missed scoring in March, but was appointed as a flight commander with the rank of temporary captain on the 15th.
Then, on 17 June, teaming with Horace Barton, George Owen Johnson, and C. E. Walton, he forced down into captivity one of Germany's leading aces, Kurt Wüsthoff.
[5] He exited the Royal Air Force in early 1919[5] and went home to Antigua,[2] due to suffering from eye strain.