In September 1940, Vichy France was forced to allow Japan to occupy French Indochina, a federation of French colonial possessions and protectorates encompassing modern day Vietnam, Laos, and Cambodia. The Vichy regime continued to administer them under Japanese military occupation. French Indochina was the base for the Japanese invasions of Thailand, Malaya, and the Dutch East Indies. On 26 September 1940, de Gaulle led an attack by Allied forces on the Vichy port of Dakar in French West Africa. Forces loyal to Pétain fired on de Gaulle and repulsed the attack after two days of heavy fighting, drawing Vichy France closer to Germany.