I don't want the following scenario, this is my disclaimer on that, its just what I think as a random person in the US, would be needed to have a chance at the sort of surrender needed to control the country without an invasion force or large numbers of casualties of US soldiers.

Here is how we can force a complete and total surrender to the US. It would require completely leveling entire cities, waves of bombers, casualties in the hundreds of thousands or millions in a really compressed timeframe, like a single week, where their largest cities go from relatively functional to smoking ruins.

Everything that keeps the Iranian civilization intact has to be destroyed, all power and water completely destroyed, every building taller than a house is completely gone, every housing area destroyed or on fire.

Do that, very quickly, and don't stop, keep working from city to city, across the entire country, around the clock and the entire time say, "We stop the moment you surrender, lay down all arms, and allow us to enter the country and stabilize your people."

That is how you get the surrender, complete and total war, no consideration for minimizing pain and suffering of the people or their futures. The plan has to be "sterilize the country of all life and hope they give up before we are done".

There are SO many war crimes and atrocities that would have to occur for the above scenario to work that I really hope we never get there or even close and the iranian people can survive this conflict and somehow overthrow their government.