Iran: My thoughts...

Any fool with a military can unilaterally start a war. But ending one, short of total and absolute destruction of your enemy (i.e. Germany 1945) is much harder. This war is likely to last a long time because Trump has completely misunderstood who he is dealing with. Religious fanatics who are unafraid of death, and who have highly developed plans to run a decentralized war, involving low tech weapons like drones and mines. To win this war, Trump needs to break the regime's willingness to fight and humiliate them on a level that leaves no doubt who won. For Iran to win, all they need to do is endure, and continue to inflict pain, primarily economic but also some military, until the American people have had enough of a war that is already deeply unpopular. The US is further hamstrung by poor planning and a reluctance to go "all in" by invading with ground forces. Additionally there is a finite supply of ordinance and high tech munitions which cannot be replaced either quickly or cheaply and which we are burning through at an alarming rate. (A fact that both China and Russia are paying very close attention to.) As of right now, I doubt this war ends before the November mid-term elections because the Iranians have zero interest in ending hostilities before then.