O7 means Officer grade: Commodore, Rear Admiral
Lower Half, or Brigadier General in
Military
Similar to O7
189FA - 189th Field Artillery Regiment
1BCT - First Brigade Combat Team
1CAV - 1st Cavalry Division
1CD - 1st Cavalry Division
1LT - First Lieutenant
1MC - General Announcing System
1MX - 1st Battalion The Middlesex Regiment
View all in Military