Members of the Việt Nam Quốc Dân Đảng assassinate the labor recruiter Bazin, prompting a crackdown by French colonial authorities.

The Việt Nam Quốc Dân Đảng, also known as the Vietnamese Nationalist Party and abbreviated VNQDĐ or Việt Quốc, was a nationalist and democratic socialist political party that sought independence from French colonial rule in Vietnam during the early 20th century. Its origins lie in a group of young Hanoi-based intellectuals who began publishing revolutionary material in the mid-1920s. In 1927, after the publishing house failed because of French harassment and censorship, the VNQDĐ was formed under the leadership of Nguyễn Thái Học. Modelling itself on the Kuomintang of Nationalist China the VNQDĐ gained a small following among northerners, particularly teachers and intellectuals. The party, which was less successful among peasants and industrial workers, and was organised in small clandestine cells.

The assassination of Alfred François Bazin, a French labour recruiter in Hanoi, colonial Vietnam on February 9, 1929 marked the beginning of the demise of the Vietnamese Nationalist Party (VNQDĐ), which perpetrated the killing. The resulting French retribution severely weakened the fledgling Vietnamese revolutionary movement and hampered its ability to undermine colonial rule.

French Indochina, officially known as the Indochinese Union and after 1941 as the Indochinese Federation, was a group of French dependent territories in Southeast Asia from 1887 to 1954. It was initially a federation of French colonies (1887–1949), later a confederation of French associated states (1949–1954). It comprised Cambodia, Laos, Guangzhouwan (1898–1945), Cochinchina, and Vietnamese regions of Tonkin and Annam. It was established in 1887 and was dissolved in 1954. In 1949, Vietnam was reunited and it regained Cochinchina. Its capitals were Hanoi (1902–1945) and Saigon.

February 9 is the 40th day of the year in the Gregorian calendar; 325 days remain until the end of the year.