The North Vietnamese and Viet Cong were supplied by a vast network of hidden trails, known as the Ho Chi Minh Trail. Which was hidden very well and many attempts were made by the U.S. to bomb and destroy it. Supplies and soldiers from North Vietnam were sent through Laos to communists forces in South Vietnam. American planes heavily bombed the Ho Chi Minh Trail; of bombs were dropped on Laos. It slowed down but did not stop the trail system.