Also known as: “L'Indochine Enchainée” Indochina, the three countries of Vietnam, Laos, and Cambodia formerly associated with France, first within its empire and later within the French Union. The term Indochina refers to the intermingling of Indian and Chinese influences in the culture of the region.French Indochina (previously spelled as French Indo-China), officially known as the Indochinese Union and after 1947 as the Indochinese Federation, was a grouping of French colonial territories in Mainland Southeast Asia until its demise in 1954.