Mickey Mantle did not serve in the US Military.

He is a MLB Legend who started with the NY Yankees as a First Baseman, and a Center Fielder during the 1950's and the 1960's. He died of liver failure, after a transplant in 1994, on August 13, 1995, at Baylor University Medical Center.

Bob Feller served with the US Army during WWII.

Joe Louis served with the US Army during WWII.

Jackie Robinson served with the US Army Segregated Core during WWII.

More Info: en.wikipedia.org