From its mistakes and the Australians' discoveries, U.S. command realized that it needed a new way to approach the dilemma of the tunnels. A general order was issued by General Williamson, the Allied Forces Commander in South Vietnam, to all Allied forces that tunnels had to be properly searched whenever they were discovered. It began training an elite group of volunteers in the art of tunnel warfare, armed only with a handgun, a knife, a flashlight, and a piece of string. The specialists, commonly known as "tunnel rats", would enter a tunnel by themselves and travel inch-by-inch cautiously looking ahead for booby traps or cornered PLAF. There was no real doctrine for the approach, and despite some very hard work in some sectors of the Army and the Military Assistance Command, Vietnam, to provide some sort of training and resources, it was primarily a new approach that the units trained, equipped, and planned for themselves.