The USNS Card, a vessel used primarily for anti-submarine warfare, was stationed at the port of Saigon during the growing conflict in Vietnam. On May 2, Viet Cong commandos executed a daring mission that involved swimming to the hull of the ship under the cover of night and detonating explosives they had planted. This incursion was part of a broader strategy employed by the Viet Cong to disrupt American military operations and convey to the U.S. that their presence in Vietnam was under constant threat. The explosion tore through the hull of the card, but despite the extensive damage caused, naval engineers and sailors worked tirelessly to salvage the vessel. The ship was ultimately raised from the waters and underwent rigorous repairs and maintenance, swiftly returning to operational status within seven months. This incident is notable not only for its audacity but for demonstrating the vulnerabilities of even the largest naval vessels when faced with guerrilla tactics in urban environments. The ability of the Viet Cong to successfully execute such a plan showcased both their tenacity and the challenges American forces encountered in Vietnam.