The Corps of Invalids was a British unit that provided garrison troops for the defence of England and Great Britain between 1688 and 1802. The men and officers were all veterans of the British Army chosen by the commissioners of the Royal Hospital Chelsea to serve in lieu of a place at the hospital or receipt of a pension. The corps was rapidly expanded or decreased in size as needs arose and played a key role in regulating the manpower requirements of the British Army. The corps was organised into a number of independent companies that were garrisoned at key points in the country, freeing up units of the regular army for service overseas. The men were generally those who were too old or wounded to serve in the regular forces and most served at least six years with the corps. In the early