The Ho Chi Minh Trail is considered one of the greatest feats of military engineering the world has ever seen... A criss-crossing network of trails from North to South Vietnam via neighbouring Laos & Cambodia, where bridges were built below the waterline to make them less visible from the air and ferries were camouflaged to make them look like floating islands. Large trucks would travel at night as US air forces would attack anything that moved during the day. Fuel tanks were hidden and buried a