The Sussex Militia was an auxiliary military force in Sussex on the South Coast of England. From their formal organisation as Trained Bands in 1572 they defended the coastline, watched the Spanish Armada and took an active part in the English Civil War. It was the Sussex Militia who captured the Duke of Monmouth after his unsuccessful Rebellion in 1685. After a long hiatus, the Sussex Militia was reformed in 1778 and provided internal security and home defence in all of Britain's major wars thereafter. It eventually became the Royal Sussex Light Infantry Militia (RSLIM) and also formed the Royal Sussex Militia Artillery. After the Cardwell Reforms the RSLIM became a battalion of the Royal Sussex Regiment and saw active service in the Second Boer War. It served as a Special Reserve training