The Vietnam Revolutionary Youth League or HVNCMTN (Hội Việt Nam Cách mạng Thanh niên, originally Việt Nam Thanh niên Cách mạng Đồng chí Hội) was an radical organization founded in 1925 by Ho Chi Minh. It served as forerunner of Vietnamese communism.
Some radicals from the League, led by Trần Văn Cung left to form the Communist Party of Indochina (1929-1930).
References
Vietnam Revolutionary Youth League Wikipedia(Text) CC BY-SA