I agree with Feanor, the Iranian Military is technologically way behind the US and Western militaries and would be quickly outgunned. there would also be NO reason for any land warfare or invasion of Iran proper. A limited Aerial campaign to reduce any threats to the Straights is all that would be required to secure the straights and send Iran a Firm message and lesson. Perhaps naval TLAMS to open an air corridor through the A2D2 network and then follow on air strikes using Standoff munitions such as the LRASM to clean up any remaining threats. That said, US bases in the Gulf region would need to heighten all security and be prepared for Quds style Asymmetrical threats as well as IRGC MRBM strikes. Would need a layer of DDG-51(SM2/6) PAC 3s and THAAD prepared to intercept incoming rounds.