The East Anglian (Essex) Heavy Battery, Royal Garrison Artillery was a part-time unit of Britain's Territorial Force formed in 1908 from part of an existing Essex volunteer artillery unit. It fought on the Western Front during World War I, at the Battles of Vimy Ridge and Passchendaele, during the German Spring Offensive, and at the Battles of Amiens, Épehy, the St Quentin Canal, the Selle and the Sambre. It was merged into a medium artillery unit from Suffolk in the postwar Territorial Army.