The United States is deploying 2,500 marines to the Persian Gulf in a move that marks the first ground troop presence in the region since the U.S.-Israel attacks on Iran began on February 28. The deployment comes as President Donald Trump presses allies to help reopen the Strait of Hormuz, a critical waterway through which roughly one-fifth of the world's oil and liquefied natural gas passes.
Who's Going and When
The marines are part of a rapid-response force currently based in Japan, built around an infantry battalion with supporting artillery, vehicles, and logistics. The roughly 2,500-strong force is expected to arrive in the Gulf region within a few weeks.
Defence analysts have already raised questions about the timing. Mark Cancian, a senior adviser at the Center for Strategic and International Studies and former Marine Corps officer, said the U.S. "should have had the marines started before the war, so they would be there now, rather than waiting two-plus weeks."
What They Might Actually Do
The most likely mission involves helping reopen the Strait of Hormuz, which has been disrupted by Iranian drones and naval mines since the conflict began. Experts say the marines could seize small Iranian-controlled islands near shipping lanes and establish air-defence systems, creating a protective corridor: navy ships escorting convoys, marines on the ground, and aircraft flying overhead, with cyber operations rounding out the effort.
A more ambitious alternative, seizing Kharg Island, a key Iranian oil hub that has already been struck by U.S. forces, has been floated, though most analysts see the strait as the more probable focus.
The Challenges Ahead
The geography is unforgiving. At its narrowest, the Strait of Hormuz is only about 33 kilometres wide, forcing vessels to travel close to Iranian territory where forces can exploit nearby islands and rugged coastlines.
Iran's toolkit is inexpensive but effective. Drones, small attack boats, and naval mines have already caused significant disruption. Anti-ship cruise missiles pose an even greater danger, with the potential to sink vessels entirely.
Cancian was blunt about the force size: "2,500 Marines just isn't enough," he said, emphasizing the importance of international allies stepping in to help, something Trump has struggled to secure, with Germany, Spain, and Italy all declining to send warships.
A High-Stakes Gamble
The marine deployment signals that the U.S. is prepared to escalate its military footprint in a conflict that has already sent oil prices surging and rattled global energy markets. Whether 2,500 troops can meaningfully shift the balance in one of the world's most strategically vital waterways remains an open question: one the coming weeks will begin to answer.
Source: CBC News
