The United States launches Operation Praying Mantis against Iranian naval forces in the largest naval battle since World War II.

In the tumultuous waters of the Persian Gulf during the latter stages of the protracted Iran-Iraq War (1980-1988), an event unfolded that dramatically escalated tensions between the United States and Iran. This flashpoint culminated in

Operation Praying Mantis
a significant naval engagement launched by the United States Armed Forces on April 18, 1988. This robust retaliatory strike, conducted within Iranian territorial waters, was a direct response to Iran's naval mining activities in the Gulf, which had severely damaged an American warship just days prior.

The immediate catalyst for Operation Praying Mantis occurred on April 14, 1988. The guided missile frigate

USS Samuel B. Roberts (FFG-58)
was on a routine deployment in the Persian Gulf as an integral part of
Operation Earnest Will
a series of convoy missions conducted from 1987 to 1988. Under this operation, U.S. warships were tasked with escorting reflagged Kuwaiti oil tankers to safeguard them from incessant Iranian attacks amidst what became known as the "Tanker War." While navigating these perilous waters, the USS Samuel B. Roberts tragically struck an Iranian mine. The resulting explosion was catastrophic, tearing a gaping 4.5-meter (15-foot) hole in the ship's hull and bringing it precariously close to sinking. Despite the immense damage, the resilient crew of the Samuel B. Roberts fought tirelessly and heroically, managing to save their vessel with no loss of life, a testament to their training and bravery. Two days later, on April 16, the damaged frigate was safely towed to Dubai in the United Arab Emirates for initial repairs.

Following the mining of the USS Samuel B. Roberts, U.S. Navy Explosive Ordnance Disposal (EOD) divers were immediately dispatched to the area to investigate and clear any additional threats. During their meticulous search, they recovered several other mines. Crucially, the serial numbers on these newly discovered mines were meticulously matched to those found on mines seized from the Iranian vessel

Iran Ajr
the previous September, a ship caught in the act of laying mines in international waters. This undeniable evidence firmly established Iran's culpability, providing irrefutable justification for a decisive American response. Consequently, U.S. military officials swiftly initiated plans for a retaliatory operation targeting Iranian assets in the Persian Gulf.

Operation Praying Mantis commenced with precision, involving a coordinated assault by U.S. naval forces against specific Iranian targets, primarily oil platforms and naval vessels. The aim was not only to punish Iran but also to deter further aggression. The engagement was characterized by multiple, simultaneous attacks across the Gulf. This included the systematic destruction of key Iranian oil platforms like Sassan, Sirri, and Rakhsh, which were being used by the Iranian Revolutionary Guard Corps (IRGC) as command and control centers for their attacks on shipping. Furthermore, U.S. forces engaged and neutralized several Iranian naval vessels, including the frigate

Sahand
and the patrol boat
Joshan
demonstrating overwhelming firepower and tactical superiority.

According to historian Bradley Peniston, the robust and decisive U.S. attack during Operation Praying Mantis played a significant role in pressuring Iran to agree to a ceasefire with Iraq later that summer, effectively bringing an end to the brutal eight-year conflict between the two Persian Gulf neighbors. The operation, therefore, had far-reaching geopolitical consequences beyond the immediate retaliation.

The legality of the U.S. actions during this period, particularly Operation Praying Mantis and its precursor, Operation Nimble Archer (October 19, 1987), was later examined by the international community. On November 6, 2003, the

International Court of Justice (ICJ)
in The Hague issued a ruling stating 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 ICJ also dismissed Iran's accompanying claim that the attacks by the United States Navy constituted a breach of the 1955 Treaty of Amity between the two countries, clarifying that the treaty's provisions only pertained to vessels and not to stationary oil platforms.

From a historical military perspective, Operation Praying Mantis holds a unique place. It stands as the largest of the five major U.S. surface engagements since the Second World War, a list that also includes the Battle of Chumonchin Chan during the Korean War, the infamous Gulf of Tonkin incident and the Battle of Dong Hoi during the Vietnam War, and the Action in the Gulf of Sidra in 1986. Beyond its scale, Operation Praying Mantis marked a significant technological milestone for the U.S. Navy, representing its first exchange of anti-ship missiles with opposing vessels. Furthermore, it remains the only occasion since World War II on which the U.S. Navy successfully sank a major surface combatant, cementing its status as a pivotal moment in modern naval warfare and a testament to the evolving nature of maritime conflict.

Frequently Asked Questions (FAQs)

What was Operation Praying Mantis?
Operation Praying Mantis was a large-scale naval and air attack launched by the United States Armed Forces against Iranian targets in the Persian Gulf on April 18, 1988, in retaliation for the Iranian mining of the USS Samuel B. Roberts.
What triggered Operation Praying Mantis?
The operation was triggered by the Iranian mining of the U.S. guided missile frigate USS Samuel B. Roberts on April 14, 1988, which severely damaged the ship. The U.S. confirmed Iranian responsibility through the identification of mines matching those previously seized from Iran.
What was the USS Samuel B. Roberts incident?
The USS Samuel B. Roberts incident refers to the event on April 14, 1988, when the U.S. frigate struck an Iranian mine in the Persian Gulf during Operation Earnest Will. The explosion caused extensive damage, nearly sinking the ship, though the crew managed to save it without any fatalities.
What were the main targets and outcomes of Operation Praying Mantis?
U.S. forces targeted Iranian oil platforms (like Sassan, Sirri, and Rakhsh) and several Iranian naval vessels, including the frigate Sahand and the patrol boat Joshan, both of which were sunk. The operation demonstrated overwhelming U.S. naval and air superiority.
Was Operation Praying Mantis considered successful?
From a military standpoint, it was a clear tactical success, achieving its objectives with precision and minimizing U.S. casualties. Historically, it's also seen as contributing to the end of the Iran-Iraq War by pressuring Iran into a ceasefire.
How did the International Court of Justice rule on Operation Praying Mantis?
In 2003, the ICJ ruled that the U.S. actions against Iranian oil platforms in both Operation Nimble Archer and Operation Praying Mantis 'cannot be justified as measures necessary to protect the essential security interests' of the U.S. However, it dismissed Iran's claim that the attacks breached the 1955 Treaty of Amity, as that treaty pertained only to vessels, not platforms.
What is the historical significance of Operation Praying Mantis for the U.S. Navy?
It holds the distinction of being the largest major U.S. surface engagement since World War II. It also marked the U.S. Navy's first combat use of anti-ship missiles against opposing vessels and the only instance since WWII where the U.S. Navy sank a major surface combatant.