The regiment was formed in 1959 by the merger of two regiments: the Somerset Light Infantry and the Duke of Cornwall's Light Infantry. Immediately before amalgamation the 1st Battalions of these regiments were stationed at Warminster and Osnabrück, respectively. The 1st Battalion The Somerset and Cornwall Light Infantry served at Osnabrück until June 1961 as part of the BAOR, when it moved to Gibraltar. Gibraltar Day is now celebrated annually on 6 October as the Regimental Day of Somerset and Cornwall Light Infantry.