The Argyll and Sutherland Highlanders (Princess Louise's) was a line infantry regiment of the British Army that existed from 1881 until amalgamation into the Royal Regiment of Scotland in March 2006. The regiment was created under the Childers Reforms in 1881, as the Princess Louise's (Argyll and Sutherland Highlanders), by the amalgamation of the 91st (Argyllshire Highlanders) Regiment of Foot and 93rd (Sutherland Highlanders) Regiment of Foot. The Argyll and Sutherland Highlanders was expanded to fifteen battalions during the First World War (1914–1918) and nine during the Second World War (1939–1945). The 1st Battalion served in the 1st Commonwealth Division in the Korean War and gained a high public profile for its role in Aden during 1967.