1. Military Specification MIL-S-3001F. (6 November 1964)
Patch "A5" on the right sleeve : 5th Army or The United States Army North (ARNORTH).
Patch "This We'll defend" : The U.S. military issues instructor badges to specially training military personnel who are charged with teaching military recruits the skills they need to perform as members of the U.S Armed Forces or teach continuing education courses for noncommissioned officers and officers in the military.