During the War and the German occupation of France, Le Corbusier did his best to promote his architectural projects. He moved to Vichy for a time, where the collaborationist government of Marshal Philippe Petain was located, offering his services for architectural projects, including his plan for the reconstruction of Algiers, but they were rejected. He continued writing, completing "Sur les Quatres routes" (On the Four Routes) in 1941. After 1942, Le Corbusier left Vichy for Paris. He became for a time a technical adviser at Alexis Carrel's eugenic foundation, he resigned from this position on 20 April 1944. In 1943, he founded a new association of modern architects and builders, the Ascoral, the Assembly of Constructors for a renewal of architecture, but there were no projects to build.