Waterloo
Henry Paget, 2nd Earl of Uxbridge, was commander of some 13,000 Allied cavalry and 44 guns of horse artillery at the Battle of Waterloo. At about 2:30 pm, at a critical stage in the battle, he led a charge of the 2,000 heavy cavalry of the Household Brigade and the Union Brigade to throw back the columns of D'Erlon's French I Corps, who were threatening to push back Picton's severely outnumbered 5th Division, with some 15,000 French infantry advancing on 3,000 British. The charge succeeded in sweeping the French infantry away in disorder, but Uxbridge was unable to rally his troops, who ran on in pursuit and were cut up by counter-attacking French cavalry. Uxbridge spent the rest of the battle leading a series of charges by British light cavalry formations, and had eight or nine horses shot from under him.
One of the last cannon shots fired on 18 June 1815 hit his right leg, necessitating its amputation above the knee. According to anecdote, he was close to the Duke of Wellington when his leg was hit, and exclaimed, "By God, sir, I've lost my leg!", to which Wellington replied "By God, sir, so you have!"
Read more about this topic: Lord Uxbridge's Leg