The escalating conflict with Iran is expected to cost the United States billions of dollars as military operations and deployments expand across the Middle East.

Early estimates suggest the first 100 hours of U.S. military operations against Iran cost roughly $3.7 billion, according to analysis from the Center for Strategic and International Studies.

Much of the spending comes from deploying aircraft carriers, fighter jets, missile defense systems and thousands of troops across the region. Intercepting missiles and drones, launching airstrikes and maintaining naval patrols all add to the rapidly growing cost of the operation. Iranian retaliatory strikes have also targeted bases used by U.S. forces in the region. In one attack, damage was reported to a radar dome at the Al Udeid Air Base in Qatar, a key U.S. military installation used for communications and command operations.

Analysts say the financial cost of the conflict could rise sharply if the fighting continues, particularly as the Pentagon seeks additional funding to replenish missiles and other weapons used during the campaign. The growing expense highlights the economic impact of a prolonged confrontation involving the United States, Iran and regional allies.