Short answers, pulled from the story.
Ho Chi Minh established the League for Independence of Vietnam on the 19th of May 1941 at Pác Bó in Cao Bằng province. The Indochinese Communist Party served as the main leadership organization behind this new group.
Nguyễn Lương Bằng took charge as Director of the General Department from 1941 until 1951. Hoàng Văn Thụ held the position of Secretary of the General Department starting in 1941 before his capture by French colonial forces in 1943.
Ho Chi Minh declared Vietnam's independence by proclaiming the establishment of the Democratic Republic of Vietnam on the 2nd of September 1945. This declaration occurred following the August Revolution takeover of nationalist organizations and Emperor Bảo Đại's abdication.
By the end of 1944, the group claimed a membership of five hundred thousand people. Two hundred thousand members resided in Tonkin while one hundred fifty thousand lived in Annam and another one hundred fifty thousand in Cochinchina.
Transfer of civil administration of North Vietnam to the Viet Minh occurred on the 11th of October 1954. Ho Chi Minh became Prime Minister of North Vietnam which would run as a socialist state.