The Great War
Prior to 1924, the Royal Field Artillery (RFA) and Royal Garrison Artillery (RGA) were separate elements of the Royal Regiment of Artillery (along with the Royal Horse Artillery and the Royal Artillery ammunition storage and supply element).
Royal Field Artillery
Members of these units were transferred to the Machine Gun Corps upon its formation in 1915.
Royal Garrison Artillery
The RGA was responsible for many of the coastal defences around the United Kingdom and out-stations of the Empire. Within these defences, machine guns were used to provide local protection for the emplacements.
Second World War
During the Second World War, the Royal Regiment of Artillery (formed from the amalgamation of the Royal Field Artillery with the Royal Garrison Artillery and Royal Horse Artillery in 1924) used the Vickers when it operated as infantry as part of the Chindit Columns in Burma. Only the 51st, 60th, and 69th Field Regiments were used in this role.