One of the most daunting jobs of the Vietnam War – if not all of military history – was that of the "Tunnel Rats." These brave men were tasked with entering tunnels dug by the Viet Cong as forward operating bases. Once inside these enemy strongholds, they would embark on search and destroy missions, clearing the underground complexes of any men and materiel with only a sidearm, bayonet, some explosives, and a flashlight for seeing in the dark depths.  Facing the Dangers of the Tunnels Enemy...