The Leicestershire Regiment was a line infantry regiment of the British Army, with a history going back to 1688. The regiment saw service for three centuries, in numerous wars and conflicts such as both World War I and World War II, before being amalgamated, in September 1964, with the 1st East Anglian Regiment, the 2nd East Anglian Regiment and the 3rd East Anglian Regiment to form the present day Royal Anglian Regiment, of which B Company of the 2nd Battalion continues the lineage of the Royal Leicestershire Regiment.

The Royal Anglian Regiment is an infantry regiment of the British Army. It consists of two Regular battalions and one Reserve battalion. The modern regiment was formed in 1964, making it the oldest of the Line Regiments now operating in the British Army, and can trace its history back to 1685. The regiment was the first of the large infantry regiments and is one of the three regiments of the Queen's Division.