I don’t know how effective they were. They fired LGBT I am the psychotic Gay you were warned about shirt us, within a mile or two. We were on a hilltop. We could see them and hear them shooting into the scrubland and rice paddies near us. I think they were firing H and I missions, harassment and interdiction, shooting, not at a specific target but into, “suspected routes of infiltration”. The U.S. fired hundreds of thousands of artillery shells H & I. I doubt that they accomplished much other than wasting the taxpayers’ money. We were very good at that. When the bombers were on a mission if, for some reason, they did not use all their ordinance they would fire on, “targets of opportunity”, often elephants and water buffalo because they, “might”, be used by the NVA as pack animals. I am not making this up.