1st Brigade

• 1 Canadian Mechanized Brigade Group
• 1st Air Cavalry Brigade, 1st Cavalry Division (United States)
• 1st Airborne Brigade (Japan)
• 1st Airlanding Brigade (United Kingdom)
• 1st Airmobile Brigade (Bundeswehr)
• 1st Armoured Brigade (Poland)
• 1st Armoured Brigade (United Kingdom)
• 1st Armoured Reconnaissance Brigade (United Kingdom)
• 1st Army Tank Brigade (United Kingdom)
• 1st Artillery Brigade (United Kingdom)
• 1st Assault Brigade Royal Engineers
• 1st Belgian Infantry Brigade
• 1st Brigade (Australia)
• 1st Brigade (Belgium)
• 1st Brigade Combat Team, 10th Mountain Division (United States)
• 1st Brigade Royal Field Artillery
• 1st Brigade, 101st Airborne Division (United States)
• 1st Brigade, 104th Division (United States)
• 1st Brigade, 1st Cavalry Division (United States)
• 1st Brigade, 1st Infantry Division (United States)
• 1st Brigade, 24th Infantry Division (United States)
• 1st Brigade, 7th Infantry Division (United States)
• 1st Brigade, Polish Legions
• 1st Canadian Armoured Brigade
• 1st Canadian Tank Brigade
• 1st Cavalry Brigade (France)
• 1st Cavalry Brigade (Imperial Japanese Army)
• 1st Cavalry Brigade (United Kingdom)
• 1st Cavalry Brigade (disambiguation)
• 1st Composite Mounted Brigade
• 1st Czechoslovak Armoured Brigade
• 1st Gibraltar Brigade
• 1st Guards Brigade (Croatia)
• 1st Guards Brigade (United Kingdom)
• 1st Helicopter Brigade
• 1st Independent Parachute Brigade (Poland)
• 1st Infantry Brigade (Estonia)
• 1st Infantry Brigade (Guards)
• 1st Infantry Brigade (South Africa)
• 1st Light Horse Brigade
• 1st Logistics Brigade (Romania)
• 1st London Infantry Brigade
• 1st Malaya Infantry Brigade
• 1st Marine Expeditionary Brigade (United States)
• 1st Mechanised Brigade (France)
• 1st Mechanised Brigade (United Kingdom)
• 1st Motor Machine Gun Brigade
• 1st Mounted Brigade (United Kingdom)
• 1st Parachute Brigade (United Kingdom)
• 1st Provisional Marine Brigade
• 1st Signal Brigade (United Kingdom)
• 1st Special Service Brigade
• 1st Surface to Air Missiles Brigade (Romania)
• 1st Sustainment Brigade (United States)
• 1st Tank Brigade (Ukraine)
• 327th Infantry Regiment (United States)
• Golani Brigade
• I Brigade, Royal Horse Artillery
• I Brigade, Royal Horse Artillery (T.F.)
• I Indian Brigade, Royal Horse Artillery