Thanks for the reply Wrgmr1. Mea culpa, I didn't ask the right question and in sufficient detail.
I have three secondary sources to hand that deal with the French Cavalry at Ocana – Oman, Digby-Smith and the Napoleonic Army Handbook. I have summarized what they say about the French cavalry present at Ocana:
French Cavalry at Ocana (Napoleonic Army Handbook)
5th Dragoons
8th Dragoons
12th Dragoons
16th Dragoons
26th Dragoons
10th Chasseurs
21st Chasseurs
3rd Dutch Hussars
Vistula Lancers
French Cavalry at Ocana (Oman)
For the battle:
Milhaud's Dragoons – 5 Dragoon Regiments
Paris Cavalry (IV Corps) – 3 Regiments
Beauregard's Cavalry (V Corps) – 4 regiments
King's Cavalry – one Guard; one Chasseurs
French Army Jan 1810 (Oman)
Milhaud's Division:
5, 12, 16, 20, 21st Dragoons
(n.b. at Talavera in Jul 09 Milhaud had thwe same, plus
the 3rd Dutch Hussars)
Paris (then Perreymond's) Brigade (IV Corps Cav):
10 & 27 Chasseurs; Vistula Lancers
(n.b. at Talavera IV Corps Cavalry had 10 & 26th
Chasseurs; Vistula Lancers and Westphalian Light
Horse)
Beauregard's Brigade (V Corps Cavalry): 10 Hussars, 21 Chasseurs, 13 & 22 Dragoons
(n.b. V Corps at the beginning of 1809 had only 10 & 21 Chasseurs)
Spanish Cavalry:
Guards, Chasseurs
French Cavalry at Ocana [Digby Smith]:
Milhaud's Division:
12,16,20, 21st Dragoons
IV Corps Cavalry:
Vistula Lancers, 3rd Dutch Hussars
V Corps Cavalry:
10th Hussars, 21st Chasseurs
Beauregard's Cavalry:
5, 8, 26th Dragoons, 10, 26th Chasseurs
Spanish Royal Guard:
Light Horse, Chasseurs
So, I need to rephrase my initial question: can anyone confirm, preferably from reliable primary or well-researched secondary sources, exactly which French cavalry units were present at Ocana and in which division and brigade were they serving?
Thanks in advance