The Cu Chi Tunnels are 75 miles of interconnecting tunnels that were employed by the Vietnamese military services throughout the Vietnamese War (or American War since they contact it). They served as hiding places and as routes for interaction and supplies. Quite a few soldiers even lived in these tunnels https://juliusquvwv.blogaritma.com/28751718/sai-gon-things-to-know-before-you-buy