The United States is dispatching a three-ship amphibious ready group and roughly 2,500 Marines and sailors to the Middle East, a significant show of force aimed at deterring Iran and reassuring regional partners amid a widening crisis.

According to U.S. defense officials, the deployment centers on a large-deck amphibious assault ship, accompanied by two additional warships capable of launching helicopters, drones and amphibious landing craft. The force is designed to operate independently for extended periods, carrying Marines trained for rapid response missions ranging from maritime security to limited combat operations.

Washington’s move comes as the conflict involving Iran and Israel intensifies, with fears that skirmishes and proxy attacks could spill over into a broader regional confrontation. U.S. officials have not publicly detailed the Marines’ specific mission, but analysts say their presence is intended to bolster protection of commercial shipping and U.S. forces already stationed in the region.

The buildup follows internal U.S. deliberations over how to respond to Iran’s efforts to project power across key maritime chokepoints. American planners have examined options that include operations to ensure freedom of navigation through the Strait of Hormuz, a vital artery for global oil supplies that Iran has repeatedly threatened to disrupt during periods of crisis.

Energy markets have reacted nervously. Oil prices have climbed sharply since the conflict began, with Brent crude hovering near $110 a barrel as traders weigh the risk of prolonged disruption to Gulf exports. Economists warn that a sustained spike in prices could undercut global growth and fuel inflation in import-dependent countries.

In Washington, the deployment has also become a test of alliance politics. U.S. officials say they have pressed European and Asian partners to contribute naval assets to any future effort to secure shipping lanes, but several governments have been reluctant to be drawn directly into a confrontation with Tehran.

On the Iranian side, the leadership has sought to frame the standoff as a test of national resilience. Supreme Leader Mojtaba Khamenei has urged unity and defiance in public messages, even as the country observes major religious and cultural holidays, including Nowruz and Eid al-Fitr, under the shadow of potential escalation.