On May 12, 2026, Iran's Islamic Revolutionary Guard Corps (IRGC) announced an expansion of its control over the Strait of Hormuz, redefining it as a "vast operational area" far larger than previously recognized. This development was reported by senior IRGC officer Mohammad Akbarzadeh, indicating a strategic shift in Iran's military posture in the region.
Why it matters: The Strait of Hormuz is a key maritime chokepoint through which about a fifth of the world's oil and liquefied natural gas typically passes. This expansion could significantly impact global energy markets and heighten tensions in an already volatile region.
The strait is now defined as stretching from the city of Jask in the east to Siri Island in the west, marking a vast increase in its military significance.
This announcement follows a previous declaration on May 4, 2026, where the IRGC published a map showing an extended zone of control along the UAE’s Gulf of Oman coastline.
The width of the strait has reportedly increased from an estimated 20-30 miles to between 200-300 miles, forming what Tasnim news agency described as a "complete crescent."
Driving the news: The announcement comes in the aftermath of heightened military operations in the region, particularly following U.S. and Israeli airstrikes on Iran that began on February 28, 2026. These strikes led to a near-total closure of the Strait of Hormuz.
Since the onset of the conflict, more than 13% of global oil supply and about a fifth of LNG flows have been disrupted, especially affecting Asian countries reliant on these resources.
Recent reports indicate that three very large crude carriers (VLCCs) successfully navigated the strait, possibly with Iran's tacit approval, hinting at a new order where Tehran dictates maritime access.
State of play: The geopolitical dynamics surrounding the Strait of Hormuz have shifted dramatically, with Iran asserting more control over who can use this strategic waterway.
Qatar's Prime Minister Sheikh Mohammed bin Abdulrahman Al Thani, alongside Turkey's Foreign Minister Hakan Fidan, condemned Iran's use of the strait as a weapon to blackmail Gulf states.
The U.S. military has reported redirecting 65 commercial vessels attempting to enter or leave Iranian ports as part of its enforcement of a naval blockade.
U.S. officials have expressed concerns that Iran's control over the strait could lead to a new normal, where Tehran selectively allows maritime traffic.
The big picture: The implications of Iran's expanded control over the Strait of Hormuz are far-reaching, potentially reshaping global energy markets and regional alliances.
President Donald Trump has called for a return to pre-war conditions in the strait as a prerequisite for any ceasefire, emphasizing that allowing Iran to manage access would undermine U.S. war aims.
European Union officials have discussed the possibility of extending naval missions to the strait to protect shipping routes once the conflict subsides.
Negotiations to end the Iran war appear stalled, with both sides entrenched in their positions, complicating efforts to restore stability in the region.
What they're saying: The rhetoric from both Iranian officials and U.S. leaders highlights the growing tensions surrounding the Strait of Hormuz.
Akbarzadeh stated, "In the past, the Strait of Hormuz was defined as a limited area around islands such as Hormuz and Hengam, but today this view has changed."
Trump remarked, "I don't think we need any help with Iran. We'll win it one way or the other, peacefully or otherwise," indicating a firm stance against Tehran.
By the numbers: The scale of the conflict's impact on global energy supplies is staggering.
Approximately 20% of the world’s oil and LNG supply typically transits through the Strait of Hormuz, making it a focal point of international trade.
Since the conflict began, the number of vessels passing through the strait has plummeted from an average of 140 daily to a trickle, severely affecting global markets.
The Pentagon has reported that the war in Iran has cost the U.S. $29 billion so far, illustrating the financial stakes involved.
What's next: The situation remains fluid, with various stakeholders weighing their options in response to Iran's actions.
As diplomatic efforts continue, Qatar and Turkey are positioning themselves as key mediators in the Iran-U.S. negotiations, seeking to restore stability in the region.
The U.S. is expected to maintain its naval presence in the region to enforce its blockade and deter Iranian aggression.
Future discussions among EU defense ministers may lead to a formal expansion of their naval mission to include the Strait of Hormuz, contingent upon the cessation of hostilities.
The developments in the Strait of Hormuz highlight the precarious balance of power in the region and the potential for escalated conflict should diplomatic efforts fail. As the situation evolves, stakeholders will be closely monitoring Iran's next moves and the international response.