In position at commencement (All details from Oman)

Lt. General Sir Arthur Wellesley KB

1ST DIVISION
Lt. General J.C. Sherbrooke (Average)

1st Brigade - Brig. General H.F. Campbell
1 Coldstream Guards 970
1/3rd Guards 1019
1 Co. 5/60th Foot 56

2nd Brigade - Brig. General A. Cameron
1/61st Foot (S. Gloucestershire) 778
2/83rd Foot 535
1 Co. 5/60th Foot 51

3rd Brigade - Brig. General E.E.K. Baron Langweth
1st Line King's German Legion 604
2nd Line King's German Legion 678
Light Companies KGL 106

4th Brigade - Brig. General S. Baron von Low
5th Line King's German Legion 610
7th Line King's German Legion 557

TOTAL: 5964

Sherbrooke was a Major General but was given the "local" rank of Lt. General.

2ND DIVISION
Major General R. Hill

1st Brigade - Major General C. Tilson
1/3rd Foot (E. Kent - "Buffs") 746
2.48th Foot (Northamptonshire) 567
2/66th Foot (Berkshire) 526
1 Co. 5/60th Foot 52

2nd Brigade - Brig. General R. Stewart
29th Foot (Worcestershire) 598
1/48th Foot (Northamptonshire) 807
1st Bn of Detachemnts 10

TOTAL: 3905

3RD DIVISION
Major General A.R. McKenzie (Average)

1st Brigade - Major General A.R. McKenzie
2/24th Foot (Warwickshire) 787
2/31st Foot (Huntingdonshire) 733
1/45th Foot (Nottinghamshire) 756

2nd Brigade - Col. R.S. Donkin (Average)
2/87th Foot (Prince of Wales' Irish) 599
1/88th Foot (Connaught Rangers) 599
5 Cos. 5/60th Foot 273

TOTAL: 3747

4TH DIVISION
Brig. General A. Campbell (Good)

1st Brigade - Brig. General A. Campbell
2/7th Foot (Royal Fusiliers) 431
2/53rd Foot (Shropshire) 537
1 Co. 5/60th Foot 64

2nd Brigade - Col. J. Kemmis (Fair)
1/40th Foot (2nd Somersetshire) 745
97th Foot (Queen's Own) 502
2nd Bn of Detachments 625
1 Co. 5/60th Foot 64

TOTAL: 2960

Note Brigades were not officially numbered but were known by the name of their commanding General.

CAVALRY
Lt. General W. Payne (Fair)

1st Brigade - Brig. General H. Fane (Good)
3rd (Prince of Wales) Dragoon Guards 525
4th (Queen's Own) Dragoons 545

2nd Brigade - Major General S. Cotton (Good)
14th (Duchess of York's Own) Lt. Drag. 464
16th (Queen's Own) Lt. Dragoons 525

3rd Brigade - Brig. General G. Anson (Good)
23rd Light Dragoons 459
1st Light Dragoons KGL 451

TOTAL: 2969

ARTILLERY

2 Co, 1 Bn RA - Captain Elliot
1 x Light 6pdr battery
6 Co, 7 Bn RA - Captain Sillery
1 x Light 6pdr battery
7 Co, 7 Bn RA - Captain Lawson
1 x 3pdr battery
2 Co, KGL - Captain Rettberg
1 x Heavy 6pdr battery 4 Co, KGL - Captain Heise
1 x Light 6pdr battery

Each battery comprises 5 cannon plus 1 Howitzer, except the 3pdr, which was all cannon.

TOTAL: 1011

Potential Reinforcements

Detached Corps

Loyal Lusitarian Legion - Col. Mayne
1st Battalion
Portuguese Regulars - 5o Cacadores (de Campomayer)

Cavalry
Loyal Lusitarian Legion (Light) (1 Sqn) [150 men]

Artillery
Loyal Lusitarian Legion Artillery (5 x 6pdrs)
TOTAL: 3630

Casalegas 23rd July, 1809

Historical Background
The Generals
Orders of Battle: French
Orders of Battle: British
Orders of Battle: Spanish
Wargaming the Battle