International Exposition. Many of her designs from this period were inspired from the vernacular furniture of Savoie, where her paternal grandparents lived — a place she visited often as a child. After working with Le Corbusier for a decade she "stepped out of his shadow into a successful career of her own." Japan and Vietnam 1940–1946 After finishing her work with Le Corbusier she worked with Jean Prouvé. He designed metal objects, like screens and stair railings. The war turned their focus to designing military barracks and furnishings for temporary housing. In 1940 France surrendered, and they parted ways until 1951. Perriand left France to go to Japan when the Germans arrived to occupy Paris in 1940. She travelled to Japan as an official advisor for industrial design to the Ministry for Trade and Industry. While in Japan she advised the government on raising the standards of design in Japanese industry to develop products for the West. On her way back to Europe she was detained and forced into Vietnamese exile because of the war. Throughout her exile, she studied woodwork and weaving and also gained much influence from Eastern design. The Book of Tea which she read at this time also had a major impact on her work and she referenced it throughout the rest of her career. In the period after World War II (1939–45) there was increased interest in using new methods and materials for mass production of furniture. Manufacturers of materials such as formica, plywood, aluminum, and steel sponsored the salons of the Société des artistes décorateurs. Designers who exhibited their experimental work at the salons in this period included Perriand, Pierre Guariche, René-Jean Caillette, Jean Prouvé, Joseph-André Motte, Antoine Philippon and Jacqueline Lecoq. Return to Paris 1946–1966 Charlotte Perriand's work was in high demand and she worked on many projects from ski resorts to student housing. She often refused to furnish buildings designed by other architects. However, she was eager to work with Jean Prouvé again, who collaborated with her on and produced several of her designs from 1951 to 1953. She also designed the interiors and kitchens for the famous Unité d'habitation. Some of her work at that particular period of time includes: The Méribel ski resort The League of Nations building for the United Nations in Geneva The remodelling of Air France's offices in London, Paris and Tokyo Les Arcs 1967–1982 The ski