 In 1940, he was put up as a candidate for the "Riigivolikogu" elections as an alternative candidate to the Estonian Working People's Union, but was deleted from the list of candidates.He later hid in Estonia, escaped to Finland in 1943, and was one of the organisers of the Estonian Bureau (an Estonian exile organisation) and assistant to the Editor-in-Chief of the "Malevlane" (a newspaper of the Estonians in the Finnish Army).In 1944 Mark moved to Sweden, where he was an assistant at the National Committee of Foreigners.