Iran has been preparing for this war for 40 years. So has Israel. They will engage in a battle of supremacy over the Middle East. Both want the USA knocked out so that the Americans can't use their influence there anymore (both consider the USA a nuisance).

As soon as ground troops land in Iran, it's over for the USA. As it is, oil and goods shipping via the Persian Gulf and the Red Sea will be controlled by Iran for a very long time to come. All Iran has to do is withstand the pummeling, which it very likely will do. And they'll get plenty of support from China, since this plays into the South China Seas plan quite nicely as the USA moves carrier after carrier out of Asia.

The corpses of Irans’s leadership have us right where they want us