4th Brigade
- 4 Canadian Mechanized Brigade Group
- 4th Airmobile Brigade (France)
- 4th Armoured Brigade (Australia)
- 4th Armoured Brigade (United Kingdom)
- 4th Brigade (Australia)
- 4th Brigade Combat Team, 10th Mountain Division (United States)
- 4th Brigade Combat Team, 2nd Infantry Division (United States)
- 4th Brigade, 104th Division (United States)
- 4th Brigade, 1st Armored Division (United States)
- 4th Brigade, 1st Cavalry Division (United States)
- 4th Brigade, 1st Infantry Division (United States)
- 4th Canadian Armoured Brigade
- 4th Canadian Infantry Brigade
- 4th Cavalry Brigade (Imperial Japanese Army)
- 4th Cavalry Brigade (Poland)
- 4th Cavalry Brigade (United Kingdom)
- 4th Cavalry Brigade (United States)
- 4th Engineer Brigade (Romania)
- 4th Guards Brigade (Croatia)
- 4th Guards Brigade (United Kingdom)
- 4th Infantry Brigade (Canada)
- 4th Infantry Brigade (Lebanon)
- 4th Infantry Brigade (New Zealand)
- 4th Infantry Brigade (South Africa)
- 4th Infantry Brigade (United Kingdom)
- 4th Light Horse Brigade
- 4th London Infantry Brigade
- 4th Mechanized Brigade (United Kingdom)
- 4th Mounted Brigade (United Kingdom)
- 4th New Zealand Armoured Brigade
- 4th Parachute Brigade (Argentina)
- 4th Parachute Brigade (United Kingdom)
- 4th Rapid Deployment Brigade (Czech Republic)
- 4th Separate Motor Rifle Brigade
- 4th Special Service Brigade
- 4th Sustainment Brigade
- IV Brigade, Royal Horse Artillery
- IV Brigade, Royal Horse Artillery (T.F.)
- Kiryati Brigade
- Skaraborg Brigade