Amalgamation
On 1 July 1881 the Childers reforms came into effect, and the 31st Foot was paired with the 70th (Surrey) Regiment of Foot to form the East Surrey Regiment. The 70th had originally been formed as the 31st's 2nd Battalion in 1756.
Following a number of amalgamations since 1959, the lineage of the 31st Foot is continued today by the Princess of Wales's Royal Regiment.
Read more about this topic: 31st (Huntingdonshire) Regiment Of Foot