Pilot Officer Ross McCulloch Simpson enlisted to the Royal Australian Air Force on 17 August 1941. He trained as a pilot at Cunderdin and Geraldton, Western Australia, and completed his operational training in England. Pilot Officer Simpson went on to serve as a pilot with 90 Squadron, based in Cambridgeshire and Suffolk, England. He flew Short Stirling aircraft in bombing and mining operations against enemy-occupied Europe. On 18 November 1943, Pilot Officer Simpson and his crew took part in a large raid over Rhine Port and Ludswighafen, Germany. Their aircraft was severely damaged, and Pilot Officer Simpson attempted to make a forced landing at Biedensand Insel, Germany. However, the aircraft exploded upon landing and all crewmembers were killed. Pilot Officer Simpson is commemorated at Runnymede Memorial, Surrey, England.