Jerry O'Keefe was a Marine pilot in World War II. He shot down 5 Japanese planes in one day on April 22, 1945, becoming an ace in one day. He shot down 2 more on April 28, 1945. He was awarded the Navy Cross and the Distinguished Flying Cross.
The real Jeremiah Joseph O'Keefe and Willie E. Gary were born on the same date (July 12).
In one scene, Jaime Foxx inexplicably holds a wooden baseball bat while strategizing with his team of attorneys which is what Tom Cruise did in A Few Good Men. Tom Cruise's character was an avid softball player and the scene took place in his home, so it made sense that he'd have the bat. Conversely, Jaime Foxx's character made no mention of why he had the bat and the scene took place in an office setting far from his home.