On January 12, 2025, President Trump announced a military blockade of the Strait of Hormuz, one of the world's most critical chokepoints for global energy supplies. The order directed the United States Navy to intercept and prevent passage of Iranian vessels and any ships that have paid transit tolls to Iran, effectively attempting to strangle Iranian oil exports. While the specific executive order number was not disclosed in initial reporting, the blockade represented a dramatic escalation of existing Iran containment policies and immediately triggered market upheaval, with crude oil prices surging past $100 per barrel and global equity markets declining sharply in response.

The blockade directly affects multiple constituencies. Iranian oil producers lose their primary export channel, immediately threatening the Iranian economy. International shipping companies and their crews face heightened risks operating in militarized waters. Global consumers and businesses confront higher energy costs, with particularly severe impacts on oil-importing nations dependent on Hormuz transit. American military personnel deployed to enforce the blockade assume increased combat exposure. Relatedly, the April 2026 troop deployment to the Middle East for Iran maritime enforcement demonstrates the administration's sustained commitment to this strategy, involving thousands of additional sailors and Marines.

This action represents a dramatic intensification of the administration's Iran policy trajectory. Previous steps—including the continuation of the national emergency with respect to Iran in March 2026, expedited arms sales to Gulf partners worth $8.6 billion in May 2026 to counter Iranian threats, and Executive Order 14382 addressing Iranian government threats—all preceded this military intervention. The blockade transforms what had been diplomatic and financial pressure into direct military confrontation with potential for escalation. The lack of disclosed judicial challenges or congressional authorization raises questions about the scope of executive war powers, though sustained high oil prices and global economic repercussions may eventually prompt legislative scrutiny or international pressure demanding de-escalation through negotiated settlement.