For those that cannot understand the Iranian military, there are two parts -- the regular force and the IRCG.
The best analogy I can come up with is that the regular forces, like militaries everywhere, are like the Wehrmacht in WW2. The IRCG is far more like the SS/Gestapo.
But these are NOT Germans. They are Iranians. And that means they are sloppy and poorly coordinated, and filled with fractious cells and secret, backchannel communication. How the hell do you think Mossad was able to locate the position of major leadership.
But there is a difference. The military will flip soon, once the pain gets to a certain level. But the IRCG, just like the SS, are the true believers. Problem is they are not true believers with order in the ranks. They are more structured agents of chaos. And their leadership faces the classic Nazi High Command problem of being held accountable for their crimes against humanity and their own people, once the fighting stops.
It's about a 2:1 ratio of regulars to IRCG. Much will depend on getting the lower ranks in the IRCG to flip, with some kind of call to amnesty. Because the top cohort is going down.
The beauty of the decapitation strategy is that their top regular military leaders are being killed. So it's turning into a no-win situation not to make a deal with the US. And that increases the pressure on the military to quickly co-opt IRCG members before they themselves are killed.
Stay tuned. The clock is running. Anyone that believes, though, that the Islamic Republic leadership is going to regain control and spread wider war is an absolute idiot. They simply don't understand Persian culture. Which does not map to Western/Teutonic leadership standards.