China sends it's Taiwanese invasion fleet to hold the Hormuz straight.
Russia and Ukraine end hostilities. Russia are too busy shipping oil while they can. Ukraine are too busy making drones for all the countries that spent 2% on vastly expensive US defence systems.
US and Israeli allies keep a battered Iran in check for another number of years, and the conflict fizzles. Dividing up Iranian influence unites them.
Previously backed Iranian groups, collapse without funding and are forced to give up starting with the letter "H"
Cuba gives up certain communist ideals for electricity and food.
Trump considers all of these as wars he's ended or averted. Sure, the markets took a hit. But they bounce back.
Trump receives every Nobel peace prize handed out, as it turns out erroneously, to other people in the past.
Initially wary, Congress give Trump another term, so he can bring his genius into solving US issues.
Sadly, he's bumped off in Dallas. Key suspects include US defence companies, broken after people realised they were no longer needed. The 20 million dollar missile that did the deed is considered to be a hint. An obsessive lone staple gunman is blamed, after he claimed to hear voices in his head from fictional brunch friends.