- Second World War (1939-1945)
- Pilot Officer
- No. 408 Squadron, Royal Canadian Air Force (No. 408 Squadron, Royal Canadian Air Force)
- Awarded on:
- July 20th, 1945
"Pilot Officer Arnill has now completed a tour of operations against the enemy on heavy bombers as navigator. He has penetrated deep into the heart of Germany on many occasions, and as been over such heavily defended targets as Saarbrucken, Kiel, Duisburg, Dortmund and Dusseldorf. On many occasions Pilot Officer Arnill displayed great courage and by his very efficient navigation was responsible for the safe return of his crew and aircraft. He has at all times proven himself to be a superior navigator and with his cheerful disregard for any difficulties was an inspiration to all his crew members. His splendid record fully warrants the award of the Non-Immediate Distinguished Flying Cross."