During the Second World War the brigade continued to be part of the 1st Infantry Division, and would remain with it throughout the war, and was sent to France on 25 September 1939, shortly after the outbreak of the war, and served as part of the British Expeditionary Force in France. The brigade was to remain in France, serving alongside the French Army on the Maginot Line on the Franco-Belgian border until May 1940 when the German Armyinvaded Holland, Belgium and France and, during the fighting, forced the BEF to retreat to Dunkirk where the 3rd Brigade was evacuated to England, arriving on 1 June 1940. After the retreat from Dunkirk it remained in the United Kingdom on home defence against a German invasion until early 1943 when it was sent to North Africa to take part in the Campaign in Tunisia. On 11 June 1943 the 1st Infantry Division was sent to the Italian island of Pantelleria which they captured and occupied without casualties. eat a meal before going into action at Anzio, Italy, 31 January 1944. In late 1943 the brigade, with the rest of the division, was sent to Italy to join the British Eighth Armyfighting in Italy. However, they were soon transferred to command of the U.S. Fifth Army for the Anzio landings, where they landed at Anzio on 22 January 1944 and were destined to fight in some of the worst and most violent battles of the Italian campaign where, during a German counterattack on 3 February, the brigade was almost completely surrounded and was only saved from annihilation by a counterattack from the 1st Battalion, London Scottish of 168th Brigade. The brigade continued to fight in numerous battles around Anzio and even when not, were still subjected to almost constant artillery, mortar or small arms fire. The brigade fought in the breakout from the Anzio beachhead and Operation Diadem. In October 1944, while the 3rd Brigade was fighting on the Gothic Line with the Eighth Army, PrivateRichard Henry Burton of the 1st Battalion, Duke of Wellington's Regiment was awarded the Victoria Cross. In the same battle, CaptainArthur Burns was awarded the Distinguished Service Order. The brigade fought in Italy until 28 January 1945 when they were sent to Palestine as a garrison where they remained to the end of the war.
Order of battle
The 3rd Infantry Brigade was constituted as follows during the war:
As part of 1st Division, the 3rd Brigade was in Egypt after the war until returning to Chiseldon, Wiltshire. During the Suez Crisis the brigade was moved to Malta, in August 1956, from where they went to Egypt on the aircraft carrier HMS Theseus, reaching Port Said just as the ceasefire was declared. It then went on to Cyprus in 1956. Following operations against EOKA, the brigade was disbanded there in 1963. From 1972, the 3rd Infantry Brigade was headquartered in the Kitchen Hill Factory in Lurgan until moving to the Mahon Road Barracks in Portadown in late 1976, under HQ Northern Ireland and was the HQ element for the security forces which controlled the South Armagh region of Ulster, including several battalions of the Ulster Defence Regiment. In September 1981 the brigade was disbanded and its units divided between 8 Brigade and 39 Brigade. The brigade reformed on 1 July 1988 in the Drumadd Barracks in Armagh. The brigade was disbanded once more on 1 September 2004 and its former units again divided between 8 Brigade and 39 Brigade. In 1989, the 3rd Infantry Brigade had the following structure:
HQ 3rd Infantry Brigade & 203rd Signal Squadron, Royal Signals, Armagh