He'd run a war like he has run all his businesses.
If he wasn't in the bag for Russia and N. Korea, he'd invade one of those just assuming, as he always does, nobody knows more about winning than he does. Even he is not stupid enough to invade China.
Invade Canada because, I don't know, they're operating as a base for radical socialist incursions supporting the street to street fighting in Portand. Fake news won't show you the footage. Biden created a disastah.
If only Trumpuppets remain in command and the military doesn't mutiny, we'll find our tanks taking over major towns (victory!) then the bloody efficient transborder guerilla war run by Canadians who look just like us and speak fluent English will be blamed on, you know, the radical socialist with their woke agenda that has unleashed the violent, grooming havoc of Transgender Terrorism!
Oh, and a war will make Trump the richest man in the world.