Military Costumes There are a countless number of ways to show your support for the military. Some may even want to dress up in a military costume for Halloween or a costume party. You could be a Marine Officer, Cadet Sailor, or Sexy Soldier for the night. In addition to the sexy military costumes, you can also shop from an assortment of military accessories as well. Here at Dizguise Costumes, it's not a battle to shop for military costumes over the Internet.