Vietnamese Revolutionary Youth League

The Vietnamese Revolutionary Youth League (Vietnamese: Việt Nam Thanh niên Cách mệnh Đồng chí Hội;

chữ Hán: 越南青年革命同志會), commonly known as Thanh niên, was founded by Nguyen Ai Quoc (later known as Ho Chi Minh) in Guangzhou in the spring of 1925. It is regarded as the "first truly Marxist organization in Indochina" and "the beginning of Vietnamese communism".

With the support of the Chinese Communist Party and the left wing of the Kuomintang, the League educated and trained a significant number of Marxist–Leninist revolutionaries between 1925 and 1927, many of whom later became leading figures of the Communist Party of Vietnam and the broader Vietnamese Revolution. At the time of its formation, Vietnam was part of colonial French Indochina.