2nd Brigade Combat Team
- 101st Airborne Division
- 2 Squadron (disambiguation)
- 25th Infantry Division (United States)
- 2nd Brigade (disambiguation)
- 2nd Brigade Combat Team, 10th Mountain Division (United States)
- 2nd Brigade Combat Team, 1st Armored Division (United States)
- 2nd Brigade Combat Team, 1st Cavalry Division (United States)
- 2nd Brigade Combat Team, 1st Infantry Division (United States)
- 2nd Division (disambiguation)
- 2nd Infantry Division (United States)
- 2nd Regiment (disambiguation)
- 34th Infantry Division (United States)
- 3rd Infantry Division (United States)
- 4th Infantry Division (United States)
- 82nd Airborne Division