Phan Châu Trinh, courtesy name Tử Cán (梓幹), pen name Tây Hồ (西湖) or Hi Mã (希馬), was an early 20th-century Vietnamese nationalist. He sought to end France's colonial occupation of Vietnam. His method of ending French colonial rule over Vietnam had opposed both violence and turning to other countries for support, and instead believed in attaining Vietnamese liberation by educating the population and by appealing to French democratic principles.

French Indochina, 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 end in 1954. It comprised Cambodia, Laos, the Chinese territory of Guangzhouwan, and the Vietnamese regions of Tonkin in the north, Annam in the centre, and Cochinchina in the south. The capital for most of its history (1902–1945) was Hanoi; Saigon was the capital from 1887 to 1902 and again from 1945 to 1954.