55th (Wessex) Field Regiment was a unit of the Royal Artillery in Britain's part-time Territorial Army (TA). Its origin was a brigade organised in 1927 from the former West Somerset Yeomanry and field batteries from Wiltshire. Just before the outbreak of World War II the Wiltshire elements were separated to form a second regiment, after which the 55th (Wessex) was often referred to simply as the West Somerset Yeomanry (WSY). It served in Home Forces for the first part of the war, but in 1942 it was assigned to the Guards Armoured Division and served with that formation throughout the campaign in North West Europe, from Normandy to the German surrender in 1945. It continued as an artillery regiment in the postwar TA until 1967.