“America’s worst secretary of defense never expressed a quiver of regret.”https://www.theatlantic.com/ideas/archive/2021/06/how-donald-rumsfeld-deserves-be-remembered/619334/
Two of the best documentaries ever made are The Fog of War and The Unknown Known.
After seeing both, I was left with the enduring memory of one Secretary being an intelligent man who had learnt massively during a life of service.
The other, Rumsfled, came across as a class clown who became a politician because nobody else would have him. Obsessed with his own intelligence and wit, he destroyed almost all he touched.