I have said many times on this forum before any Allied Intervention in Iran will follow a similar model to Libya and Kosovo and not the occupation model like that of Afghanistan and Iraq
US + Arab coalition will not send 300,000 + troops to drive straight up to Teheran and take over the place. No, a more smarter strategy from the pentagon will commence in which troops will be used to take over the Iranian persian gulf coast and special forces used to assist local ethnic Arab, Baloch, Azeri and Kurd freedom fighters to take strategic points. The rest of the regimes assets will then be destroyed with air power thus allowing the Iranian people to easily overthrow the despotic mullah regime they have been trying to rid themselves of for over 30 years now