How can they do that? That is a question that no one in the entire world has an answer.
It is what Carl von Clausewitz said, that you got to mass or concentrate the force, then attack.
So, the United States must mass a force somewhere, from which it can launch an attack or invasion. But, all you base belong to us. Iranian missiles work.
At the height of the Vietnam War for the Americans, there was over 600,000 troops in South Vietnam. They will need such numbers again and probably more. They need to reinstate the draft. Yes, the same draft that their current president was able to evade five times.
That Kharg Island idea is pure lunacy. The United States does not have air superiority, and Iran can hit that island with artillery hidden in the mountains.
It is kind of bizarre. It is like the Americans cannot accept they have no more bases left in the region to mount such an operation, but still talk like they do. No, they have no capability to do this.
The United States is outgunned in this fight. Iran has home field advantage. The United States is outgunned, plain and simple.
Only one side is running out of ammo. We can be sure about that.
