People have said why didn't the U.S. just destroy the Ho chi Minh trail and cut off supplies and troops coming into South Vietnam , the U.S. spent10 years trying to just that there were many problems with the trail , one, it was a series of trails not just the one trail , two , many of the trails went through Laos and Cambodia this was a political problem , three , the North Vietnamese could repair the damage almost as fast as it happen .:sorry: