Earl of Cardigan is an English peerage title. It was created in 1661 for Thomas Brudenell, who had been previously created Baron Brudenell (1628) and was an English Baronet, Brudenell of Deen. In 1790 the title Baron Brudenell of Deene merged with the earldom. The titles were inherited by the second Marquess of Ailesbury in 1868; the two titles have remained united since.
Cardigan was acquitted on a technicality and retained the command of his regiment until he was promoted to Major-General on 20 June 1854.
Cardigan asserted that his command was independent of Lucan's control but their hostility manifested itself both at Varna and the day before the battle of the Alma.
Cardigan led the Light Cavalry into the "Valley of Death" in the charge of the Light Brigade; he was the first in and the first out of the attack on the Russian guns and was unscathed.