At 8 p.m., the destroyers USS Maddox and USS C. Turner Joy, operating in the Gulf of Tonkin, intercept radio messages from the North Vietnamese that give Captain John Herrick of the Maddox the "impression" that Communist patrol boats are planning an attack against the American ships, prompting him to call for air support from the carrier USS Ticonderoga.
Eight Crusader jets soon appeared overhead, but in the darkness, neither the pilots nor the ship crews saw any enemy craft. However, about 10 p.m. sonar operators reported torpedoes approaching. The U.S. destroyers maneuvered to avoid the torpedoes and began to fire at the North Vietnamese patrol boats. When the action ended about two hours later, U.S. officers reported sinking two, or possibly three of the North Vietnamese boats, but no American was sure of ever having seen any enemy boats nor any enemy gunfire. Captain Herrick immediately communicated his doubts to his superiors and urged a "thorough reconnaissance in daylight." Shortly thereafter, he informed Admiral U. S. Grant Sharp, commander of the Pacific Fleet, that the blips on the radar scope were apparently "freak weather effects" while the report of torpedoes in the water were probably due to "overeager" radar operators.
Because of the time difference, it was only 9:20 a.m. in Washington when the Pentagon received the initial report of a potential attack on the U.S. destroyers. When a more detailed report was received at 11 a.m. there was still a lot of uncertainty as to just what had transpired. President Johnson, convinced that the second attack had taken place, ordered the Joint Chiefs of Staff to select targets for possible retaliatory air strikes. At a National Security Council meeting, Secretary of Defense Robert McNamara, Secretary of State Dean Rusk, and McGeorge Bundy, Special Assistant to the President for National Security Affairs, recommended to the president that the reprisal strikes be ordered. Johnson was cautious at first, but in a follow-up meeting in the afternoon, he gave the order to execute the reprisal, code-named Pierce Arrow. The President then met with 16 Congressional leaders to inform them of the second unprovoked attack and that he had ordered reprisal attacks. He also told them he planned to ask for a Congressional resolution to support his actions. At 11:20 p.m., McNamara was informed by Admiral Sharp that the aircraft were on their way to the targets and at 11:26, President Johnson appeared on national television and announced that the reprisal raids were underway in response to unprovoked attacks on U.S. warships. He assured the viewing audience that, "We still seek no wider war." However, these incidents proved to be only the opening moves in an escalation that would eventually see more than 500,000 U.S. troops in Vietnam.