A large portion of the bombing that we did was against the Ho Chi Minh trail. But it was on/off on the orders of LBJ and MacNamara and I don’t think that bombing alone would ever have shut it down sufficiently. My opinion is that the only way to have won the war is to have used the strategy that worked in WWII. Invade, destroy their army in its home, occupy their cities and arrest their leaders.
I’d have to see a source on that. I had a student whose dad was stationed near HCM Trail and could see it with his naked eyes. Said they could have shot PAVNs all day, but were prohibited from shooting across the border.