When the Volunteer Force was subsumed into the Territorial Force (TF) in 1908 under the Haldane Reforms, the 2nd Hampshire Royal Garrison Artillery (Volunteers) was reorganised to provide two Royal Field Artillery (RFA) brigades for the TF's new Wessex Division: the I (or 1st) Wessex Brigade at Southsea (from HQ and Nos 1–8 Companies) and the IV (or 4th) Wessex Brigade on the Isle of Wight (from Nos 10 and 11 Companies).