Cap badge Duke of Cornwall's Light Infantry

The Duke of Cornwall's Light Infantry (DCLI) was an infantry regiment of the British Army from 1881 to 1959. Its lineage is continued today by The Rifles.

The regiment was created on 1 July 1881 as part of the Childers Reforms, by the merger of the 32nd (Cornwall Light Infantry) Regiment of Foot and the 46th (South Devonshire) Regiment of Foot. The DCLI also incorporated the militia and rifle volunteers of Cornwall.

In 1959 the regiment merged with the Somerset Light Infantry to form the Somerset and Cornwall Light Infantry.

In the war the regiment was increased to seven battalions. In 1944 Hill 112 in Normandy acquired the name "Cornwall Hill" after Cornish soldiers of 5th Duke of Cornwall's Light Infantry suffered 320 casualties in the fighting there.