France was one of the Triple Entente powers in World War I against Germany and the Central Powers. France was one of the Allied Powers in World War II, but was conquered by Nazi Germany in 1940. The Third Republic was dismantled, and most of the country was controlled directly by Germany while the south was controlled until 1942 by the collaborationist Vichy government. Living conditions were harsh as Germany drained away food and manpower, and many Jews were killed. The Free France movement that took over the colonial empire, and coordinated the wartime Resistance. Following liberation in 1944, the Fourth Republic was established. France slowly recovered, and enjoyed a baby boom that reversed its very low fertility rate. Long wars in Indochina and Algeria drained French resources and ended in political defeat. In the wake of the 1958 Algerian Crisis, Charles de Gaulle set up the French Fifth Republic. Into the 1960s decolonization saw most of the French colonial empire become independent, while smaller parts were incorporated into the French state as overseas departments and collectivities. Since World War II France has been a permanent member in the UN Security Council and NATO. It played a central role in the unification process after 1945 that led to the European Union. Despite slow economic growth in recent years, it remains a strong economic, cultural, military and political factor in the 21st century.