April 18, 1988 – Operation Praying Mantis was an attack on April 18, 1988, by U.S. naval forces within Iranian territorial waters in retaliation for the Iranian mining of the Persian Gulf during the Iran–Iraq war and the subsequent damage to an American warship. On 14 April, the guided missile frigate USS Samuel B. Roberts struck a mine while deployed in the Persian Gulf as part of Operation Earnest Will, the 1987–88 convoy missions in which U.S. warships escorted reflagged Kuwaiti oil tankers to protect them from Iranian attacks. The explosion blew a 25-foot (7.6-meter) hole in the Roberts’s hull and nearly sank it. The crew saved their ship with no loss of life, and Roberts was towed to Dubai on 16 April. After the mining, U.S. Navy divers recovered other mines in the area. When the serial numbers were found to match those of mines seized along with the Iran Ajr the previous September, U.S. military officials planned a retaliatory operation against Iranian targets in the Persian Gulf. According to Bradley Peniston, the attack by the U.S. helped pressure Iran to agree to a ceasefire with Iraq later that summer, ending the eight-year conflict between the Persian Gulf neighbors. On November 6, 2003, the International Court of Justice ruled that “the actions of the United States of America against Iranian oil platforms on 19 October 1987 (Operation Nimble Archer) and 18 April 1988 (Operation Praying Mantis) cannot be justified as measures necessary to protect the essential security interests of the United States of America.” However, the International Court of Justice dismissed Iran’s claim that the attack by United States Navy was a breach of the 1955 Treaty of Amity between the two countries. This battle was the largest of the five major U.S. surface engagements since the Second World War, which also include the Battle of Chumonchin Chan during the Korean War, the Gulf of Tonkin incident and the Battle of Dong Hoi during the Vietnam War, and the Action in the Gulf of Sidra in 1986. It also marked the U.S. Navy’s first exchange of anti-ship missiles by ships. On 18 April, the U.S. Navy attacked with several groups of surface warships, plus aircraft from the carrier USS Enterprise (CVN-65), and her ASW/AAW escort USS Truxtun (CGN-35). The action began with coordinated strikes by two surface groups. One surface action group, or SAG, consisting of the destroyers USS Merrill (DD 976) and USS Lynde McCormick (DDG 8), plus the amphibious transport dock USS Trenton (LPD-14) and its embarked Marine Air Ground Task Force, was ordered to destroy the guns and other military facilities on the Sassan oil platform. At 8am, the SAG commander, who was also the commander of Destroyer Squadron 9, ordered the Merrill to radio a warning to the occupants of the platform, telling them to abandon it. The SAG waited 20 minutes, then opened fire. The oil platform fired back with twin-barrelled 23mm ZU-23 guns. The SAG’s guns eventually disabled some of the ZU-23s, and platform occupants radioed a request for a cease-fire. The SAG complied. After a tug carrying more personnel had cleared the area, the ships resumed exchanging fire with the remaining ZU-23s, and ultimately disabled them. Cobra helicopters completed the destruction of enemy resistance. The Marines boarded the platform, and recovered a single wounded survivor (who was transported to Bahrain), some small arms, and intelligence. The Marines planted explosives, left the platform, and set them off. The SAG was then ordered to proceed north to the Rakhsh oil platform to destroy it. As the SAG departed the Sassan oil field, two Iranian F-4s made an attack run, but broke off when the Lynde McCormick locked its fire control radar on the aircraft. Halfway to the Rahksh oil platform, the attack was called off in an attempt to ease pressure on the Iranians and signal a desire for de-escalation. The other group, which included guided missile cruiser Wainwright and frigates Simpson and Bagley, attacked the Sirri oil platform. Navy SEALs were assigned to capture, occupy and destroy the Sirri platform but due to heavy pre-assault damage from naval gunfire, it was determined that an assault was not required. Iran responded by dispatching Boghammar speedboats to attack various targets in the Persian Gulf, including the American-flagged supply ship Willy Tide, the Panamanian-flagged Scan Bay and the British tanker York Marine. All of these vessels were damaged in different degrees. After the attacks, A-6E Intruder aircraft launched from CVN 65 were directed to the speedboats by an American frigate. The two aircraft, piloted by “Lizards” Lieutenant Commander James Engler and Lieutenant Paul Webb, dropped Rockeye cluster bombs on the speedboats, sinking one and damaging several others, which then fled to the Iranian-controlled island of Abu Musa. Action continued to escalate. The Joshan, an Iranian Combattante II Kaman-class fast attack craft, challenged USS Wainwright (CG-28) and Surface Action Group Charlie. The commanding officer of USS Wainwright directed a final warning (of a series of warnings) stating that the Joshan was to “stop your engines, abandon ship, I intend to sink you”. Joshan responded by firing a Harpoon missile at them. The USS Simpson (FFG-56) responded to the challenge by firing two Standard missiles, while Wainwright followed with one Standard missile. The attacks destroyed the Iranian ship’s superstructure but did not immediately sink it, so USS Bagley (FF-1069) fired a Harpoon of its own; the missile did not find the target. SAG Charlie closed on the Joshan, with Simpson, then Bagley and Wainwright firing guns to sink the crippled Iranian ship. Two Iranian F-4 Phantom fighters then approached the Wainwright. One fighter left the area soon after the cruiser placed its 55B Fire Control Radar in search mode. The second fighter made a low-altitude approach towards the warship, which responded by firing two SM-2 missiles at the fighter. One hit the Iranian aircraft, blowing off part of its wing and peppering the fuselage with shrapnel. The Iranian pilot managed to land his damaged airplane at Bandar Abbas. Fighting continued when the Iranian frigate IS Sahand (F74) departed Bandar Abbas and challenged elements of an American surface group. The frigate was spotted by two Lizard A-6Es while they were flying surface combat air patrol for USS Joseph Strauss (DDG-16). Sahand fired missiles at the A-6Es, which replied with two Harpoon missiles and four laser-guided Skipper bombs. USS Joseph Strauss fired a Harpoon. Most, if not all of the shots scored hits, causing heavy damage and fires. Fires blazing on Sahand’s decks eventually reached her munitions magazines, causing an explosion that sank the vessel. Late in the day, the Iranian frigate IS Sabalan (F73), departed from its berth and fired a surface-to-air missile at several A-6Es from VA-95. The Intruders then dropped a Mark 82 laser-guided bomb into the Sabalan’s stack, crippling the ship and leaving it burning. The Iranian frigate, stern partially submerged, was taken in tow by an Iranian tug, and was repaired and eventually returned to service. VA-95’s aircraft, as ordered, did not continue the attack. The A-6 pilot who crippled the Sabalan, LCDR James Engler, was awarded the Distinguished Flying Cross by Admiral William J. Crowe, Chairman of the Joint Chiefs of Staff, for the actions against the Sabalan and the Iranian gunboats. Iran may have fired Silkworm missiles from land bases against SAG Delta in the Strait of Hormuz and against USS Gary (FFG-51) in the northern central Persian Gulf. U.S. officials, in their after-action report, said there was no evidence of this. Lee Allen Zatarain in “Tanker War” presents evidence that Iran did launch missiles, which were engaged by the targeted U.S. Navy ships without damage. Following the attack on the IS Sabalan, U.S. naval forces were ordered to assume a de-escalatory posture, giving Iran a way out and avoiding further combat. Iran took the offer and combat ceased, though both sides remained on alert, and near-clashes occurred throughout the night and into the next day as the forces steamed within the Gulf. Two days after the battle, the USS Lynde McCormick (DDG 8) was directed to escort a U.S. oiler out through the Strait of Hormuz, while a Scandinavian-flagged merchant remained near, probably for protection. While the ships remained alert, no hostile indications were received, and the clash was over.