Military officers who commit crimes are not tried by a civilian court but undergo the court-martial process overseen by the Department of Defense, so it’s an internal legal structure administered by the Federal government.
Many current and retired servicemen and women of the U.S. armed forces do not understand the court-martial system and, if they run into trouble, can face much harsher penalties than they might have, due to a lack of good legal counsel.
Knowledge is a powerful aid
To handle their defense effectively, military personnel are better prepared if they understand the court-martial process. The Military Rules of Evidence apply to all courts-martial, meaning the accused must be proven guilty beyond a reasonable doubt in order to be punished.