Answer
The Crimean War, fought from 1853 to 1856 between the Russian Empire and an alliance of the Ottoman Empire, France, the United Kingdom, and Sardinia, is the conflict in which James Thomas Brudenell, 7th Earl of Cardigan, gained fame as a military leader. Cardigan commanded the British light cavalry during the war, particularly during the famous Charge of the Light Brigade at the Battle of Balaclava in 1854.