Iran, better the current regime, will know as soon as U.S. troops deploy that they will loose power.
They only have one thing in common with the Iranian people, still well remembering their vivid 60ies in which hardly any other nation had invested as much into education as the Shah's Kingdom, and that is sympathy for the Palestinian struggle in the same conflict they are proxy of.
Iran will fire in the first month every single rocket against Israel until they are empty. Todo so they need to unpack their quick launch systems, which they must have because the trucks are transport trucks that also can launch rockets, and dedicate troops before starting a counter insurgency towards their rocket force systems rather useless in a core point occupied Iran under heavy air and satellite surveillance facing battle hardened troops on the ground.
Iran must have a vast decentralized network of mountain bunkers connected by the known 30t standard European design lorries dedicated to take Israel along them in case of substantial inner revolts or an overwhelming outer threat and potentially just not have used until here their Anti-Jet systems at all waiting for a major IDF air raid in a large scale war.
In the weeks the U.S. airforce will prepare parachute raids and the creation of forward Cavalry positions by air raids, they will also face such until here hidden systems comparable to the Serbian mission. During that part of the war, they will shoot all they have knowing with the first parachute regiments and tanks landed using highways, they have to leave the bunkers to surrender, create last hold outs or start insurgency warfare.
As an Iranian facing Mossad agents, it means having an enemy of the Palestinian well being, but also an enemy against the Regime. Facing a U.S. soldier means having someone from a nation admired in the best times of Iran's younger history.
The U.S. Soldier cannot loos that war against tyranny, he might die liberating another human.
#MIB
