If a man living in Michigan in 1943 entered the U.S. Army...?

My dad did mentioned this place once......

I think he would be at Fort Gordon, Georgia since Military Police Corps was only established in 1941, which was formerly known as "The Provost Marshal General School".

At Fort Benjamin Harrison (Indianapolis, IN)

But in 1943, most MP's never received actual MP training

They were just assigned as MP's either temporarily or were assigned to the billet from some other mos

I have an uncle who was wounded on D-Day, who was sent back to England to recover , and while in England, they made him an MP, where he stayed for the rest of the war. He was trained as infantry.

Most MPs would have been trained at the base they served from.

It isn't as if such a facility needed high security or even required a central location. By 1943, they were handling a large force in two theaters. They had a lot of people in the military.