The following units of the German First Army and British Expeditionary Force fought in the Battle of Mons in World War I.
German First Army
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First Army, commanded by Generaloberst Alexander von Kluck
II Army Corps
- 30th Aviation Battalion
- 15th Foot Artillery Regiment (heavy)
- 3rd Artillery Brigade
- 3rd Horse Grenadiers
- 5th Infantry Brigade
- 2nd Grenadier Regiment
- 9th Grenadier Regiment
- 6th Infantry Brigade
- 34th Fusilier Regiment
- 42nd Infantry Regiment
- 4th Artillery Brigade
- 12th Dragoons
- 7th Infantry Brigade
- 14th Infantry Regiment
- 149th Infantry Regiment
- 8th Infantry Brigade
- 49th Infantry Regiment
- 140th Infantry Regiment
III Army Corps
- 7th Aviation Battalion
- 2nd Guard Foot Artillery (heavy)
- 3rd Hussars
- 5th Artillery Brigade
- 9th Infantry Brigade
- 8th Leib Grenadier Regiment
- 48th Infantry Regiment
- 10th Infantry Brigade
- 12th Grenadier Regiment
- 52nd Infantry Regiment
- 6th Artillery Brigade
- 11th Infantry Brigade
- 20th Infantry Regiment
- 35th Fusilier Regiment
- 12th Infantry Brigade
- 24th Infantry Regiment
- 64th Infantry Regiment
- 3rd Jaeger Battalion
IV Army Corps
- 9th Aviation Battalion
- 4th Foot Artillery Regiment (heavy)
- 10th Hussars
- 7th Artillery Brigade
- 13th Infantry Brigade
- 26th Infantry Regiment
- 66th Infantry Regiment
- 14th Infantry Brigade
- 27th Infantry Regiment
- 165th Infantry Regiment
- 8th Artillery Brigade
- 15th Infantry Brigade
- 36th Fusilier Regiment
- 93rd Infantry Regiment
- 16th Infantry Brigade
- 72nd Infantry Regiment
- 153rd Infantry Regiment
- 4th Jaeger Battalion
IX Army Corps
- 9th Aviation Battalion
- 20th Foot Artillery Regiment (heavy)
- 16th Dragoons
- 17th Artillery Brigade
- 33rd Infantry Brigade
- 75th Infantry Regiment
- 76th Infantry Regiment
- 34th Infantry Brigade
- 89th Grenadier Regiment
- 90th Fusilier Regiment
- 9th Jaeger Battalion
- 18th Artillery Brigade
- 35th Infantry Brigade
- 84th Infantry Regiment
- 86th Fusilier Regiment
- 36th Infantry Brigade
- 31st Infantry Regiment
- 85th Infantry Regiment
III Reserve Corps
- 2nd Reserve Dragoon Regiment (3 squadrons)
- 6th Reserve Field Artillery Regiment (6 batteries)
- 9th Reserve Infantry Brigade
- 8th Reserve Infantry Regiment
- 48th Reserve Infantry Regiment
- 10th Reserve Infantry Brigade
- 12th Reserve Infantry Regiment
- 52nd Reserve Infantry Regiment
- 3rd Reserve Uhlan Regiment (3 squadrons)
- 6th Reserve Field Artillery Regiment (6 batteries)
- 11th Reserve Infantry Brigade
- 20th Reserve Infantry Regiment
- 24th Reserve Infantry Regiment
- 12th Reserve Infantry Brigade
- 26th Reserve Infantry Regiment
- 35th Reserve Infantry Regiment
IV Reserve Corps
- 1st Reserve Schwere Reiter Regiment (3 squadrons)
- 7th Field Artillery Regiment (6 batteries)
- 13th Reserve Brigade
- 27th Reserve Infantry Regiment
- 36th Reserve Infantry Regiment
- 14th Reserve Brigade
- 66th Reserve Infantry Regiment
- 72nd Reserve Infantry Regiment
- 4th Reserve Jaeger Battalion
- 1st Reserve Jäger zu Pferde Regiment (3 squadrons)
- 22nd Reserve Field Artillery Regiment (6 batteries)
- 43rd Reserve Infantry Brigade
- 71st Reserve Infantry Regiment
- 94th Reserve Infantry Regiment
- 11th Reserve Jaeger Battalion
- 44th Reserve Infantry Brigade
- 32nd Reserve Infantry Regiment
- 82nd Reserve Infantry Regiment
10th Mixed Landwehr Brigade
- 12th Landwehr Infantry Regiment
- 52nd Landwehr Infantry Regiment
11th Mixed Landwehr Brigade
- 20th Landwehr Infantry Regiment
- 35th Landwehr Infantry Regiment
27th Landwehr Brigade
- 53rd Landwehr Infantry Regiment
- 55th Landwehr Infantry Regiment
Composite Landwehr Cavalry Unit (3 squadrons) Composite Lansturm Artillery Unit (2 batteries)
Army Troops
- 12th Aviation Battalion
British Expeditionary Force
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British Expeditionary Force, commanded by Field Marshal Sir John French
Army Troops
- A and C Squadrons North Irish Horse
- B Squadron South Irish Horse
- 1st Bn Queens Own Cameron Highlanders
Line of communications defence troops
- 1st Devonshire
- 19th Infantry Brigade (formed 22 August 1914)
- 2nd Bn Royal Welsh Fusiliers
- 1st Bn Cameronians (Scottish Rifles)
- 1st Bn Duke of Cambridge’s Own
- 2nd Argyll and Sutherland Highlanders
I Corps
I Corps, commanded by Lieutenant-General Douglas Haig
- 1st Guards Brigade
- 1st Coldstream Guards
- 1st Scots Guards
- 1st Black Watch
- 2nd Royal Munster Fusiliers
- 3rd Infantry Brigade
- 1st Royal West Surrey Regiment
- 1st South Wales Borderers
- 1st Gloucestershire Regiment
- 2nd Welsh
- XXV Brigade, Royal Field Artillery
- 113th Battery
- 114th Battery
- 115th Battery
- XXVI Brigade, Royal Field Artillery
- 116th Battery
- 117th Battery
- 118th Battery
- XXXIX Brigade, Royal Field Artillery
- 46th Battery
- 51st Battery
- 54th Battery
- XLIII (Howitzer) Brigade, Royal Field Artillery
- 30th (H) Battery
- 40th (H) Battery
- 57th (H) Battery
- 26th Heavy Battery Royal Garrison Artillery
- 4th Guards Brigade
- 2nd Grenadier Guards
- 2nd Coldstream Guards
- 3rd Coldstream Guards
- 1st Irish Guards
- 5th Infantry Brigade
- 2nd Worcestershire
- 2nd Oxfordshire and Buckinghamshire Light Infantry
- 2nd Highland Light Infantry
- 2nd Connaught Rangers
- 6th Infantry Brigade
- 1st Liverpool Regiment
- 2nd South Staffordshire
- 1st Royal Berkshire
- 1st Kings Royal Rifle Corps
- XXXIV Brigade, Royal Field Artillery
- 22nd Battery
- 50th Battery
- 70th Battery
- XXXVI Brigade, Royal Field Artillery
- 15th Battery
- 48th Battery
- 71st Battery
- XLI Brigade, Royal Field Artillery
- 9th Battery
- 16th Battery
- 17th Battery
- XLIV (Howitzer) Brigade, Royal Field Artillery
- 47th (H) Battery
- 56th (H) Battery
- 60th (H) Battery
- 35th Heavy Battery Royal Garrison Artillery
II Corps
II Corps, commanded by General Horace Smith-Dorrien
- 7th Infantry Brigade
- 3rd Bn Worcestershire Regiment
- 2nd Bn South Lancashire Regiment
- 1st Bn Duke of Edinburgh's (Wiltshire Regiment)
- 2nd Bn Royal Irish Rifles
- 8th Infantry Brigade
- 2nd Royal Scots
- 2nd Royal Irish Regiment
- 4th Middlesex Regiment
- 1st Gordon Highlanders
- 9th Infantry Brigade
- 1st Northumberland Fusiliers
- 4th Royal Fusiliers
- 1st Lincolnshire
- 1st Royal Scots Fusiliers
- XXIII Brigade, Royal Field Artillery
- 107th Battery
- 108th Battery
- 109th Battery
- XL Brigade, Royal Field Artillery
- 6th Battery
- 23rd Battery
- 49th Battery
- XLII Brigade, Royal Field Artillery
- 29th Battery
- 41st Battery
- 45th Battery
- XXX (Howitzer) Brigade , Royal Field Artillery
- 128th (H) Battery
- 129th (H) Battery
- 130th (H) Battery
- 48th Heavy Battery Royal Garrison Artillery
- 13th Infantry Brigade
- 2nd Bn Kings Own Scottish Borderers
- 2nd Bn Duke of Wellington’s
- 1st Bn Royal West Kent
- 2nd Bn Yorkshire Light Infantry
- 14th Infantry Brigade
- 2nd Bn Suffolk Regiment
- 1st Bn East Surrey Regiment
- 1st Bn Duke of Cornwall's Light Infantry
- 2nd Bn Manchester Regiment
- 15th Infantry Brigade
- 1st Bn Norfolk Regiment
- 1st Bn Bedfordshire Regiment
- 1st Bn Cheshire Regiment
- 1st Bn Dorsetshire Regiment
- XV Brigade, Royal Field Artillery
- 11th Battery
- 52nd Battery
- 80th Battery
- XXVII Brigade, Royal Field Artillery
- 119th Battery
- 120th Battery
- 121st Battery
- XXVIII Brigade, Royal Field Artillery
- 122nd Battery
- 123rd Battery
- 124th Battery
- VIII (Howitzer) Brigade, Royal Field Artillery
- 37th (H) Battery
- 61st (H) Battery
- 65th (H) Battery
- 108th Heavy Battery Royal Garrison Artillery
Cavalry Division
Cavalry Division, commanded by Major-General Edmund Allenby
- Artillery
Royal Flying Corps in the Field
Royal Flying Corps, commanded by Brigadier-General David Henderson
- 2nd Aeroplane Squadron (Charles Burke)
- 3rd Aeroplane Squadron (John Salmond)
- 4th Aeroplane Squadron (Raleigh)
- 5th Aeroplane Squadron (John Frederick Andrews Higgins)
- 1st Aircraft Park (Carden)
Sources
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (August 2015) (Learn how and when to remove this message) |
- Bell, Ron. “The Old Contemptibles.” Strategy & Tactics, Number 228 (May/June 2005).
- Terraine, John. Mons, The Retreat to Victory. Wordsworth. pp. 200–202