Green was also a member of the British bobsleigh team in the mid-1930s, winning several medals including World Cup gold and Olympic bronze.

In March 1939 he underwent further conversion training on the Airspeed Oxford in preparation for 601 to switch to the Bristol Blenheim light bomber.

Over the next months, he flew a wide variety of aircraft, including the Hind and Fairey Battles before returning to the Blenheim.

On 25 November he shot down a Dornier Do 17 piloting Spitfire LZ-V, whose destruction was confirmed by the Royal Navy as it was seen crashing in mid Channel, but unsubstantiated.

No loss by Luftwaffe, only one Do 17 slightly damaged, either by 421 Flight or by 234 Squadron F/O Edward Brian "Mortie" Mortimer-Rose piloting X4243.

[1] On 16 June he was posted to Headquarters Fighter Command as a Staff Officer and spent the next few months in a variety of roles, including a short stint as a German Heinkel He 111 pilot in the film The First of the Few.

600 Squadron RAF on 14 November to command A flight,[1] which flew the Beaufighter II, a version powered by the Rolls-Royce Merlin engines instead of their normal Bristol Hercules, a combination he said was "the most dangerous aircraft to fly that was ever made".

The next day he was hit by fire from a destroyer near Bouficha, which led to the aircraft being too heavily damaged to immediately return to flight.

While covering the action during the invasion of Sicily, over a period of three nights in July, Green and Gillies were credited with seven confirmed kills, including four on one sortie.

By the end of the month, his score was nine destroyed, two probables and four damaged, and on 29 July he was awarded the Distinguished Service Order.

During this time the 600 gained such a fearsome reputation that their presence would be announced in the Allied press to ward off Luftwaffe operations.

[4] He had his last kill, on a Ju 88, on 25 January 1944, by which point Luftwaffe operations were beginning to wind down as the full effect of the Soviet advances and massive increase in RAF and USAAF bombing began.

On 11 April 1944 he received the Soviet Order of the Patriotic War 1st Class, and on 8 July 1944 he was awarded the US Distinguished Flying Cross.

232 Wing, a composite unit flying Spitfires, Fairchilds, Bostons, Dakotas, Mosquitoes, Sea Otters, Proctors, Ansons, Oxfords and a Vickers Warwick.

[1] Green left the Air Force in 1947 and returned to South Africa with his new wife Ruth, a Canadian nurse he met in Italy in 1946.

Green and his wife then retired to a farm in Collingwood, Ontario, Canada, near her childhood home in Owen Sound.