Agreed. I see lots of discussion of "invading Iran." The more immediate issue will be repelling an Iranian invasion of Iraq.
Repelling an Iranian invasion or Iraq would be easy. To invade they would have to move massive amounts of troops and equipment. As soon as they start to move we know where they are and here come the airstrikes. Lots of dead Iranians all over the desert. If they (Iran) thought they lost a lot of troops against Iraq, they ain't seen nothing yet.