Der Alte Fritz – really ?
I know them only as fully armoured, with some complaining about shortages of replacement equipment.
The listing from Nafziger is actually taken from :
Capitaine (puis colonel) Alphonse Grasset.
La Guerre d'Espagne (1807-1813), rédigée à la section historique de l'état-major de l'armée.
Paris & Nancy : Berger-Levrault.
T. I. – de octobre 1807 à avril 1808 (1914)
It is based on archival sources.
However, do note the date : janvier.
By juillet, at the time of the disaster at Baylen, we have ;
situation du 1er juillet 1808 du 2e corps d' observation de la Gironde
Brigade Dupré, à Andujar
1er provisoire de chasseurs à cheval : détachements des 1er, 2e, 7e, 13e et 21e chasseurs, major Achille Royer, 21 officiers et 474 hommes présents sous les armes
2e provisoire de chasseurs à cheval : détachements des 5e, 11e, 12e , 16e et 20e chasseurs, major Jean-Baptiste Bureau, 20 officiers et 433 hommes présents sous les armes
see :
Lieutenant-colonel Joseph-Charles-Auguste Clerc.
La Capitulation de Baylen : Causes et Conséquences.
Paris : Thorin et Fils, 1903.
Again based on archival sources.
In any case these guys were all lost in the summer, so not exactly the ones at Sagahun in décembre.
At Sagahun, the commander was Pierre-Claude-"Louis"-Robert , le comte (futur duc) de Tascher de la Pagerie, a cousin of the Empress :
Born on Martinique 1 avril 1787, student at the Ecole militaire, sous-lieutenant in 1806, comte de l'empire in 1810, married Marie-Amélie le princesse de Leyen (1788-1872) in août 1810, senateur under the 2e Empire in 1852, died at Paris 3 mars 1861.
From Appleton's American Biography :
"Tascher De La Pagerie, Louis Robert Pierre Claude, Count and afterward Duke, West Indian soldier, born in Fort de France. Martinique, 1 April, 1787; died in Paris, France, 3 March, 1861. He was a first cousin to Empress Josephine, and received his early education in Martinique. Napoleon Bonaparte summoned him to France in 1802, and placed him at the military school of Fontainebleau. He was promoted lieutenant in 1806, assisted in the battle of Eylau, was aide-de-camp to Napoleon at the battle of Friedland, served under Junot in Portugal in 1808, was afterward aide-de-camp to Prince Eugene de Beauharnais, son of Empress Josephine, and, accompanying him to Bavaria in 1815, became a major-general in the Bavarian army. He was created a senator of the empire on 31 December, 1852, and made on 27 January, 1853, grand-master of the Empress Eugenie's household, which post he retained till his death. By his marriage with Princess Marie de Leyen, he had several sons, one of whom was for some years French consul-general in New Orleans, Porto Rico, and Havana."
It would appear at Sagahun that the 21-year-old Tascher was now holding the rank of colonel en 2e, and that his chasseurs were a second formation of the 1er régiment provisoire de chasseurs, apparently from sweeping the dépôts of several régiments of hussards and chasseurs in southwestern France, plus some men of the régiments lost at Baylen who had not left Madrid with their units because of illness or inury, and adding in 1-2 "escadrons" de marche of un-assigned minty fresh conscripts. Perhaps 200-250 total chasseurs. I am sure the British were very impressed with their horsemanship and tactical skill.
After Sagahun this "unit" was disbanded and later a third version of the 1er provisoire de chasseurs was formed in mid-1810 from the full 4e escadrons of the 11e and 24e chasseurs, plus the usual odds and sods found lying about on the route from Bayonne to Madrid in green habits and, with luck, hussard boots.