[AtomicJew]

I have earned 9 medals so far. Eight go in the obvious spots in the display case, and the ninth, the Distinguished Service Cross, goes in the Middle of the eight slots.
The Medal of Honor is not awarded for simply finishing the game and is not displayed in the eight spots. The Medal of Honor is displayed with ribbon, draped over the full display case.

Finishing all missions earns a medal:
Easy = Bronze Star
Medium = Silver Star
Hard = Distinguished Service Cross


Each Mission has a Medal that can be won.
M1 = Legion of merit = Rescue 2 POWs
M2 = Norwegian War Cross = Steal Documents on Sub
M3 = American Campaign Medal = Survive Omaha Beach
M4 = Good Conduct Medal = Kill 2 Tiger Tanks
M5 = Distinguished Service Medal = No Tank Crew losses
M6 = Army Commendation Medal = Fewer than 5 Ranger losses

Re-Earning:
This only works if you earned the medal in the first place. You Must Complete The Mission to see the medals in your display case.
Quit the game, then start it back up.
Load the last saved game from a completed mission that you think you earned a medal in. ( Best to pick right before you finish the mission. ) When you either finish the mission again, or die, the very first stats screen should say "Medal Awarded."
If you see that message, but you do not see the appropiate medal for that level, you have to re-complete that mission from that saved game.
If it does not say Medal Awarded, you can try a different saved game, and then re-complete the mission from that point.

Medals you cannot earn:
Purple Heart
Europe Africa Middle-East Campaign
Soldiers Medal

AtomicJew aka Tretch Axebiter