Operation Crimp was the largest operation of the war with 8,000 total troops troops deployed. The goal of Operation Crimp was to capture the Vietcong headquarters believed to be located in Saigon. American forces failed to locate a significant Vietcong base.

Australians were the first ones down tunnels in Vietnam and General Williamson had, up until the Crimp Operation held a great distaste for sending the troops down the tunnels, preferring to use smoke, tear gas or explosives." During Operation Crimp news of what the Australians were doing DOWN tunnels quickly spread to the American Forces who were also finding tunnels.

Because of the amount of Intelligence that was recovered from the Crimp - Cu Chi Tunnels, Tunnel Teams were established and American Forces throughout Vietnam received instructions to clear tunnels before destroying them.