France reached its territorial height during the 19th and early 20th centuries, when it ultimately possessed the second-largest colonial empire in the world.[10] In World War I, France was one of the main winners as part of the Triple Entente alliance fighting against the Central Powers. France was also one of the Allied Powers in World War II, but came under occupation by the Axis Powers in 1940. Following liberation in 1944, a Fourth Republic was established and later dissolved in the course of the Algerian War. The Fifth Republic, led by Charles de Gaulle, was formed in 1958 and remains to this day. Following World War II, most of the French colonial empire became decolonized.