4th Brigade
In military terms, 4th Brigade may refer to:
Argentina
Australia
Biafra
British India
Canada
China
Croatia
Czech Republic
France
Georgia
Germany
Greece
Iran
Ireland
Israel
Japan
Kazakhstan
Lebanon
New Zealand
Poland
Romania
Russia
Serbia
South Africa
Sweden
Turkey
Ukraine
United Kingdom
- 4th Anti-Aircraft Brigade (United Kingdom)
- 4th Armoured Brigade (United Kingdom), 1939–1945
- 4th Cavalry Brigade (United Kingdom)
- 4th Guards Brigade (United Kingdom)
- 4th Infantry Brigade (United Kingdom)
- 4th Light Brigade (United Kingdom)
- 4th London Infantry Brigade
- 4th (London) Mounted Brigade
- 4th Mechanized Brigade (United Kingdom)
- 4th Mounted Brigade (United Kingdom)
- 4th Parachute Brigade (United Kingdom)
- 4th Provisional Brigade (United Kingdom)
- 4th Reserve Brigade
- 4th Special Service Brigade
Artillery units
- 4th Brigade Royal Field Artillery
- 4th County of London Brigade, Royal Field Artillery
- 4th East Anglian Brigade, Royal Field Artillery
- 4th Home Counties Brigade, Royal Field Artillery
- 4th Lowland Brigade, Royal Field Artillery
- 4th Northumbrian (County of Durham) Brigade, Royal Field Artillery
- 4th North Midland Brigade, Royal Field Artillery
- 4th South Midland Brigade, Royal Field Artillery
- 4th East Lancashire (Howitzer) Brigade, Royal Field Artillery
- 4th West Lancashire Medium Brigade, Royal Garrison Artillery
- 4th Brigade, Welsh Division, Royal Artillery
- 4th Welsh Brigade, Royal Field Artillery
- 4th West Riding Brigade, Royal Field Artillery
- 4th Wessex Brigade, Royal Field Artillery
- 4th Highland (Mountain) Brigade, Royal Garrison Artillery
- 4th Brigade, Northern Division, Royal Artillery
- 4th Brigade, North Irish Division, Royal Artillery
- 4th Brigade, Scottish Division, Royal Artillery
- IV Brigade, Royal Horse Artillery
- IV Brigade, Royal Horse Artillery (T.F.), Territorial Force
United States
- 4th Brigade, 1st Cavalry Division (United States)
- 4th Brigade, 1st Infantry Division (United States)
- 4th Brigade, 104th Division (United States)
- 4th Cavalry Brigade (United States)
- 4th Combat Aviation Brigade
- 4th Maneuver Enhancement Brigade
- 4th Marine Expeditionary Brigade
- 4th Medical Brigade
- 4th Reserve Officers' Training Corps Brigade
- 4th Security Force Assistance Brigade
- 4th Sustainment Brigade
Brigade Combat Teams
- 4th Brigade Combat Team, 1st Armored Division
- 4th Brigade Combat Team, 1st Cavalry Division
- 4th Brigade Combat Team, 1st Infantry Division
- 4th Brigade Combat Team, 2nd Infantry Division
- 4th Brigade Combat Team, 3rd Infantry Division
- 4th Brigade Combat Team, 4th Infantry Division
- 4th Brigade Combat Team, 10th Mountain Division
- 4th Brigade Combat Team, 82nd Airborne Division
- 4th Brigade Combat Team, 101st Airborne Division