French Indochina was officially known as the Indochinese Union then the Indochinese Federation.
French Indochina ( previously spelled as French Indo-China ) ( Indochine française សហភ ពឥណ ឌ ច ន Đông Dương thuộc Pháp , [ ɗə̄wŋm jɨ̄əŋ tʰûək fǎp ] , frequently abbreviated to Đông Pháp ; ຝຣັ່ງແຫຼັມອິນດູຈີນ Cantonese : ) , officially known as the Indochinese Union ( Union indochinoise ) after 1887 and the Indochinese Federation ( Fédération indochinoise ) after 1947 , was a grouping of French colonial territories in Southeast Asia . Indochina . The term was later adopted as the name of the colony of French Indochina ( today 's Vietnam , Cambodia and Laos ) , and the entire area of Indochina is now usually referred to as the Indochinese Peninsula or Mainland Southeast Asia .