Did Eisenhower see combat in WWI? MacArthur led a brigade (?). After the war, Eisenhower was on MacArthur’s staff for a while.

‘Oppenheimer told me that Bradbury found it hard to explain “a statement attributed to you that you had lost your first and second quality scientists and were in danger of losing your third, fourth and fifth.” This was like many another statement attributed to me in that I had never said it or anything resembling it.’

And Groves had big eyes for grabbing the best officers:

‘Because we were in a hurry, we concentrated at first mainly on graduates of West Point. We wanted officers who as cadets had been highly regarded by the Academic Board not only for their scholastic achievements but for their other qualities. We preferred men who were among the first five or ten of their class, and we did not want anyone who stood below the first 10 per cent. A successful athletic career, demonstrating a more than average determination and will to win, was a particular asset. Later, when it became necessary to secure a large number of young officers for duty at the new Sandia Base at Albuquerque for our bomb assembly teams, these requirements were relaxed slightly. Also, as time went on, it became possible to make a searching investigation of the background, educational and military, of other officers, not graduates of West Point, and to bring them in. My request for highly qualified officers was not greeted with too much enthusiasm by the General Staff, whose position was very well put by General Handy, when he said there was no reason why I should have a solid group of the best officers in the Army; that there were other important things besides the Manhattan Project. Many officers I wanted were in rather important spots overseas. All of them were officers that no commander wanted to lose.’

This greedy-grabbing was bound to make enemies of the rest of the Army. It might be why Eisenhower called in Groves in 1948, gave him a chewing, told him he’d never head the Army Engineers, and caused his retirement. But Eisenhower conducted his sex life by screwing his subordinates, and might have hosed Groves just for fun.