The need for a higher organisational command structure for medium and heavy artillery became apparent during the Battle of France and the early part of the Western Desert Campaign. The 'Army Group Royal Artillery' concept was developed during Exercise 'Bumper' held in the UK in 1941, organised by the commander of Home Forces, General Alan Brooke with Lt-Gen Bernard Montgomery as chief umpire. This large anti-invasion exercise tested many of the tactical concepts that would be used by the British Army in the latter stages of the war. The gunnery tacticians developed the AGRAs as powerful artillery brigades, usually comprising three medium regiments and one heavy regiment, which could be rapidly moved about the battlefield, and had the punch to destroy enemy artillery with counter-battery fire. AGRAs were provided to field armies at a scale of about one per Army corps. AGRAs were improvised until 26 November 1942, when they were officially sanctioned, to consist of a commander and staff to control non-divisional artillery.
World War II
The Headquarters of 1st AGRA was formed at Hamilton Park, Glasgow, on 24 August 1942. It was assigned to First Army for the landings in North Africa, and arrived in Tunisia in January 1943, together with 56th Heavy Regiment, equipped with 7.2-inch howitzers – the first heavy regiment of the RA to serve overseas since the Dunkirk evacuation in 1940. 1st AGRA went into action in February in support of XIX French Corps with one heavy, three medium and three field regiments under command. Later it supported V Corps in the closing stages of the campaign. It then prepared for the Allied invasion of Italy. The make-up of an AGRA during the Italian Campaign was extremely flexible: it could include army field regiments, medium regiments and heavy regiments with 7.2-inch howitzers. It might also be augmented with 3.7-inch heavy anti-aircraft guns loaned by the AA brigades for additional ground support fire. tractor towing a 7.2-inch howitzer round a tight corner in Italy, December 1943. 1st AGRA landed in Italy in October 1943, operating with V Corps again, this time under Eighth Army. For V Corps' attack on the Sangro in November 1943, 1st AGRA contributed 51st Medium Regiment alongside the guns of 6th AGRA for a massive artillery concentration. It transferred temporarily to X Corps in February 1944, operating on the River Garigliano. Both 1st and 6th AGRAs supported XIII Corps in July 1944 as it approached the Gothic Line. This time the front was so wide that control of the medium guns had to be decentralised to the individual divisions, so the two AGRAs only retained two medium regiments in addition to their two heavy regiments. However, when the 2nd New Zealand Division attacked on 29 July, it was supported by a concentration including the field artillery of 6th South African Armoured and 8th Indian Divisions as well as 1st AGRA, which was responsible for coordinating CB fire. 1st AGRA was assigned to V Corps for the assault on the Gothic Line in August 1944, and remained with it for the rest of the war. 1st AGRA fought at the Battle of the Argenta Gap in early 1945, ending the war at Padua.
1st AGRA's formation badge was a shield in the RA colours of blue and red, divided vertically, with a vertical yellow cannon barrel superimposed in the centre; this was also used by 3 AGRA in 1947. 1 AGRA, formed in 1955, adopted a ram's skull in black and white on a red background.
