It was a simple question. Not sure what your agitation is about. But yeah, I think LBJ was paralyzed because of what happened in Korea and for that very reason he tried to make it a "limited" war, with the result that North Vietnam, with material help from russia and china was able to regroup, rearm and re-attack in South Vietnam over and over and over again... until we left.
You found agitation in that sentence, where?
So China was the reason that we went in, and then fought so long, through LBJ and Nixon, and Nixon, and most of us still remain in the dark about the length of the war and the way it wasn’t fought?
I know that China was a factor, and in the 60s and 70s I used to mention China, but it never was a great explanation.