A US-led naval coalition officially launched operations in Bahrain Thursday (November 7th) to protect shipping in the troubled waters of the Gulf, after a string of attacks that Washington and its allies blamed on Iran.
The coalition, aimed at warding off the perceived threat to the world's oil supply, has been in the making since June.
Bahrain, which hosts the US Navy's Fifth Fleet, joined the International Maritime Security Construct (IMSC) in August. Saudi Arabia and the UAE followed suit in September.
Australia and Britain are the main Western countries to have agreed to send warships to escort Gulf shipping. The newest member, Albania, joined on Friday.
Vessels will be escorted through the Strait of Hormuz, the strategic chokepoint at the head of the Gulf and the main artery for the transport of Middle East oil.
Large naval vessels such as frigates and destroyers will provide overwatch of critical chokepoints, while smaller naval vessels will patrol between them.
Airborne surveillance will monitor the flow of traffic through the highest risk areas.
Vice Admiral Jim Malloy, commander of US Naval Forces in the Middle East, said Operation Sentinel is a defensive measure aimed at protecting Gulf waters.
"While Sentinel's operational design is threat-based, it does not threaten," he said during a ceremony at the IMSC's command centre.
"We employ capable warships on patrol, but there is no offensive line of effort in this construct, other than a commitment to defend each other if attacked.
"Our commitment to the region isn't short-lived, it is enduring, and we will operate as part of Sentinel for as long as it is needed -- as long as the threat looms."
'Acts of sabotage'
On May 12th, the UAE said four commercial oil tankers -- two Saudi, one Emirati and one Norwegian -- had been targeted by "acts of sabotage" in waters off its coast.
Washington and Riyadh blamed Tehran, which denied involvement.
A month later, the Kokuka Courageous was hit and around the same time another tanker in the area, the Norwegian-owned Front Altair, was damaged by three explosions, according to the Norwegian Maritime Authority.
They were transiting through the Strait of Hormuz towards the Indian Ocean.
Then on September 14th, drone strikes targeted two key Saudi oil facilities onshore, causing catastrophic damage and temporarily knocking out half of the kingdom's oil production.
The attacks were claimed by Yemen's Iran-backed Houthis (Ansarallah), but Washington and Riyadh blamed Iran, saying the strikes were carried out with advanced missiles and drones.