Historians of the Reddit-sphere, good day, what was the Vietnamese military like? What were their tactics, who were their ancestral enemies, were they often conquered or did they manage to function as an independent state for most of their existence?
That's a rather broad question. Did you have a specific time frame in mind or are you trying to cover all of history? Also, do you mean the Viet (Kinh) people, or the nation of Vietnam and it's precursors?