"More narcissistic presidents tend to only exit wars if they can say they won, and they will extend wars to find a way to declare some kind of victory," says political scientist John P. Harden, from The Ohio State University.
"They want to look heroic and strong and competent – even if it means fighting the war beyond what is reasonable."
https://www.sciencealert.com/theres-an-intriguing-link-between-us-presidents-and-the-wars-they-wage
