North Vietnamese Civil War

I don't remember where I read about a timeline where a less sucessfull Tet Offensive ignites a civil war between the Vietcong and the North Vietnamese government. Do you think it is plausible? Could it happen in other circumstances?
Also, if you know the timeline I'm saying can you give it's name? :p I want to read it.
 
But the Tet Offensive wasn't successful. It was just that the TV images of US forces being cut down didn't sit well with the viewers back home, which earned brownie points for the North Vietnamese. Not to mention, the failure of the offensive smashed the Vietcong as a political force, which allowed Hanoi to fully dictate post-unification policies thereafter. And there's the fact that Hanoi and the Vietcong are working towards the exact same goal - unification under the North. For a civil war to break out would require some radical divergences in the Vietcong's goals from North Vietnam's, such as a federal Vietnam or a democratic, multi-party Vietnam. A sense of betrayal probably won't suffice as justification to make themselves look like traitors in the eyes of world communism.
 
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