Durham Light Infantry cap badge, King's crown

The Durham Light Infantry (D.L.I.) was a light infantry regiment of the British Army in existence from 1881 to 1968. It was formed in 1881 under the Childers Reforms by the amalgamation of the 68th (Durham) Regiment of Foot (Light Infantry) and the 106th Regiment of Foot (Bombay Light Infantry) along with the Militia and Volunteers of County Durham.
In 1968, the regiment was amalgamated with the Somerset and Cornwall Light Infantry, the King's Own Yorkshire Light Infantry and the King's Shropshire Light Infantry to form The Light Infantry.