Battle in First Indochina War in 1950s

In late 1945, the Vietminh, a group of communist rebels, launched a significant battle against French colonial forces. This conflict was a response to France's declaration that Vietnam would be an autonomous state within the French Union, which the Vietminh opposed, leading to a bloody revolt.

What was the outcome of the Vietminh's struggle in terms of state autonomy?

What was the significance of the French Union in the context of Vietnam's autonomy?