Douglas Svend Fletcher is born in Svendborg, Denmark. He enlists for the Royal Australien Air Force in 1943. I presume he was British and not Danish subject.
André Knud Sonnichsen enlists for the Royal Canadian Air Force in 1941, and becomes master of a RCAF Marine Craft. I have little information on his service though.
A small number of Danes working in the plantation industry in Malaysia in the 1930s volunteers in 1940-41 for the Malayan Volunteer Air Force – a small force that support the allied forces in South-East Asia during the 1941-42 campaign.
The Soviet Union attacked Finland on 30 November 1939. People all over the world were appalled by the aggression. To many Danes it was an inexcusable attack on a neutral country and a sister nation.