Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. XII COrps was an army corps of the British Army in World War I and World War II. IN World War I it formed part of the British Salonika Force on the Macedonian front In World War II it formed part of Second Army during the Normandy and North-West Europe campaigns of 1944-45. XII COrps was formed in France on 8 September 1915 under the command of Lt-Gen Sir Henry Fuller Maitland Wilson. IN November 1915, XII Corps was sent from France with 22nd, 26th and 28th Divisions under command to reinforce Allied forces on the Macedonian front. WIlson and his corps headquarters (HQ) arrived at the port of Salonika on 12 November, but the commander of the British Salonika Force (BSF) took XII Corp''s staff to establish his own HQ.