Apparently Trump didn’t just not read, he also didn’t watch documentaries or even movies.
It turned out that the generals had rules, standards, and expertise, not blind loyalty. The President’s loud complaint to John Kelly one day was typical: “You fucking generals, why can’t you be like the German generals?”
“Which generals?” Kelly asked.
“The German generals in World War II,” Trump responded.
“You do know that they tried to kill Hitler three times and almost pulled it off?” Kelly said.
But, of course, Trump did not know that. “No, no, no, they were totally loyal to him,” the President replied. In his version of history, the generals of the Third Reich had been completely subservient to Hitler; this was the model he wanted for his military. Kelly told Trump that there were no such American generals […]
— “Inside the War Between Trump and His Generals“
“In his version of history” should have been “In his delusion”.