During the war about 100,000 people from Tanganyika joined the Allies. Tanganyikans with the King's African Rifles fought in the East African Campaign against the Italians, in the Madagascar Campaign against the Vichy French, and in the Burma Campaign against the Japanese. Tanganyika became an important source of food and Tanganyika's export income greatly increased from the pre-war years of the Great Depression; however, this led to a rise in inflation.