The 31st Marine Expeditionary Unit Plans to send thousands of US troops to the Middle East for potential operations against Iran have sparked a stark warning from military analysts. Experts say the numbers being discussed are nowhere near enough — and claim a full-scale campaign could require more than a million troops. Former and current military figures argue that deploying a few thousand soldiers against a country as large and populous as Iran would be vastly insufficient. The warning comes as President Donald Trump considers sending additional forces to the region. The proposed reinforcements include around 10,000 extra soldiers. They would join roughly 3,000 paratroopers and about 5,000 US Marines already preparing for potential ground attacks. Altogether, that would add to around 50,000 American personnel already stationed at bases across the Gulf. These forces include soldiers, sailors, airmen and women currently involved in bombing operations in Iraq and responding to Iranian missile and drone attacks. Critics say such numbers pale in comparison to the scale of previous wars. During the height of the US-led operations in Iraq between 2007 and 2008 — known as the surge ordered by George W. Bush — around 185,000 American and allied troops were deployed. Those troops were attempting to suppress an insurgency that had grown after the invasion that toppled Iraq’s dictator. Even with those numbers, stability proved elusive. Alongside coalition forces were between 450,000 and 550,000 Iraqi government troops. Yet despite the combined strength of roughly three-quarters of a million soldiers, the country still faced major security crises. In 2014, the militant group Islamic State seized large parts of northern Iraq and declared its own “state”. The group went on to sponsor global terror attacks for years. Analysts say the comparison highlights the immense scale of any conflict with Iran. The country has around 90 million people and covers a landmass roughly comparable to western Europe. Even smaller war zones required massive deployments. At the peak of the fighting in Afghanistan’s Helmand Province between 2009 and 2011, about 35,000 troops from the United States, the United Kingdom and other allies were concentrated in the region. That force included about 25,000 US Marines sent in a surge to support the British-led mission. Earlier British deployments had grown from around 3,000 troops in 2006 to roughly 10,000. Despite those numbers, allied forces struggled to secure the province. Yet Helmand is about 28 times smaller than Iran. The current troop movements also involve elite marine units designed for rapid-response operations. Two of the most prominent are the 31st Marine Expeditionary Unit and the 11th Marine Expeditionary Unit. Each unit contains around 2,500 personnel and operates from amphibious assault ships such as the USS Tripoli and the USS Boxer. These ships function as mini-aircraft carriers. They carry Marine fighter jets, Osprey tilt-rotor aircraft, helicopter gunships, transport helicopters and artillery. Analysts say such forces could potentially conduct targeted operations. One possible objective discussed by strategists is capturing Kharg Island, a key centre of Iran’s oil exports. The same units could also be used to try to counter Iranian threats to shipping passing through the Strait of Hormuz. The narrow waterway is only about 21 miles wide and is a crucial route for global oil shipments. Even so, military experts warn such operations would carry serious risks. Kharg Island lies more than 300 miles north of the Strait of Hormuz, leaving any captured territory exposed to Iranian counterattacks. There are also concerns about evolving battlefield technology. Analysts point to the rise of first-person drones used extensively by Russia during the war in Ukraine. Such drones could potentially swarm attacking troops while transmitting live footage of the fighting. Iran also has substantial military forces of its own. Its ground forces include around 600,000 personnel across the regular army, the Islamic Revolutionary Guard Corps and the Basij militia. According to British military veteran Nick Borton, any successful large-scale invasion would require enormous manpower. He said the US and its allies would need “many hundreds of thousands” of troops. Some former NATO generals have estimated even higher numbers. They believe a successful ground war might require well over a million soldiers. Borton pointed to another recent example: Russia’s invasion of Ukraine. Russia initially attacked with around 250,000 troops but failed to achieve its goals. The Russian military now has roughly 800,000 personnel involved in the conflict and still has not secured victory. Ukraine itself is less than half the size and population of Iran. Borton said limited operations were possible. Tactical missions such as seizing Kharg Island or parts of the coastline would require fewer troops. But he warned such operations could quickly expand without a clear long-term strategy. Without clarity of purpose, he said, a military operation would be “doomed”. Analysts also note that the objectives of the conflict remain uncertain. While the United States has been targeting Iranian military capabilities, Israel has focused on the possibility of regime change in Tehran. That lack of a single clear goal could complicate any military campaign. As tensions rise, experts say the numbers being discussed so far represent only a fraction of what would be needed for a full-scale war. For now, the question remains whether the troop movements signal a limited strike — or the early stages of something far larger. US needs a million troops to control Iran not the thousands on the way
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