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.

A battalion is a military unit, typically consisting of up to one thousand soldiers commanded by a lieutenant colonel and subdivided into a number of companies, each typically commanded by a major or a captain. The typical battalion is built from three operational companies, one weapons company and one headquarters company. In some countries, battalions are exclusively infantry, while in others battalions are unit-level organisations.