| 1899 – present day|
| United Kingdom|
| 3rd (United Kingdom) Division|
The 12th Armoured Infantry Brigade, formerly the 12th Mechanized Brigade, is a regular British Army brigade which has been in existence since 1899 and now forms part of 3rd Mechanised Division.
12th Armoured Infantry Brigade (United Kingdom) Wikipedia
The brigade was first formed in December 1899 as 12th Infantry Brigade and saw action at the Battle of Rensburg, Battle of Norval's Point, Battle of Biddulph's Berg and Battle of Slabbert's Nek.
During the First World War, the 12th Infantry Brigade, a regular army formation, was assigned to the 4th Infantry Division. It was dispatched to France, crossing the English Channel on 22 August 1914, as part of the British Expeditionary Force (BEF) and saw action in the First Battle of the Marne beginning in September 1914. It then spent much of the rest of the conflict engaged in trench warfare.
Brigade units during the First World War included:1st Battalion, King's Own Royal Regiment (Lancaster)
2nd Battalion, the Lancashire Fusiliers
2nd Battalion, Essex Regiment
2nd Battalion, Duke of Wellington's (West Riding Regiment) (from January 1916 to 10th Bde. February 1918)
2nd Battalion, Royal Irish Regiment (from March 1915, to 11th Bde. July 1915)
1/5th Battalion, South Lancashire Regiment (from February 1915 until January 1916)
1/2nd Battalion, Monmouthshire Regiment (until January 1916)
From early November 1915 until February 1916 the 12th Brigade was swapped with the 107th Brigade of the 36th (Ulster) Division.
During the Second World War, except for a few brief periods of detachment, the brigade formed part of the 4th Infantry Division, as in the First World War. It was part of the British Expeditionary Force (BEF) and took part in the Dunkirk evacuation in May 1940. The brigade remained in the United Kingdom for the next two years, preparing and training to repel Operation Sea Lion, the German invasion of England, although that never arrived. It moved to North Africa in February 1943 to take part in the later stages of the Tunisia Campaign and saw action at the Battle of Oved Zara, the Battle of Medjez Plain and the Battle of Tunis. It then took part in the Italian Campaign, moving to Naples in February 1944 and saw further action at the Fourth Battle of Monte Cassino. By October 1944 the 4th Division was taking part in the British Eighth Army's battle on the Gothic Line but was withdrawn in November to spend the rest of the war in Greece, part of the Allied force tasked to prevent civil unrest as rival factions attempted to fill the political vacuum when the Germans withdrew from the country.
The 12th Infantry Brigade was constituted as follows during the war:2nd Battalion, Royal Fusiliers
1st Battalion, South Lancashire Regiment (until June 1940)
1st Battalion, Black Watch (until March 1940)
6th Battalion, Black Watch (from March 1940)
1st Battalion, Queen's Own Royal West Kent Regiment (from September 1940)
The following officers commanded the brigade during the war:3 September 1939 Brigadier John Clark
20 October 1939 Brigadier John Hawkesworth
18 June 1940 Brigadier Daniel Beak
10 December 1941 Brigadier R. G. W. Callaghan
14 April 1943 Lieutenant Colonel J. M. Haycroft (Acting)
17 April 1943 Brigadier Richard Hull
17 June 1943 Brigadier Gordon MacMillan
22 June 1943 Lieutenant Colonel B. J. G Madden (Acting)
29 June 1943 Lieutenant Colonel J. M. Haycroft (Acting)
7 July 1943 Lieutenant Colonel T. P. D. Scott
12 November 1943 Brigadier F. M. Elliott
26 April 1944 Brigadier A. G. W. Heber-Percy
The Brigade was disbanded in March 1947, but reformed from 91 Lorried Infantry Brigade in April 1956. During the 1970s, it was one of two "square" brigades assigned to 2nd Armoured Division. After being briefly converted to "Task Force Delta" in the late 1970s, the brigade was reinstated in 1981, assigned to 1st Armoured Division and based at Quebec Barracks at Osnabrück. It remained with 1st Armoured Division, apart from a spell under HQ 3rd Armoured Division during Operation Granby, until disbandment under Options for Change. Following the Strategic Defence Review in 1998, the brigade was reformed in mechanized form under 3rd Mechanised Division at Aldershot Garrison: it relocated to Ward Barracks in Bulford Camp in February 2004.
The brigade headquarters, with two battle groups – the 1st Battalion The Royal Anglian Regiment and the 1st Battalion The Grenadier Guards – deployed to Afghanistan in 2007 to form the headquarters and main infantry combat units of Task Force Helmand as a part of the NATO International Security Assistance Force. Under Army 2020, its headquarters remains at Bulford and it forms part of the Reaction Force. It has been renamed 12th Armoured Infantry Brigade and includes the following units:The Royal Lancers (Formation Reconnaissance)
The King's Royal Hussars (Armoured)
1st Battalion, Scots Guards (Heavy Protective Mobility) (Note: This Heavy Protected Mobility Infantry Unit rotates amongst the five Guards Division Battalions)
1st Battalion, The Yorkshire Regiment (14th/15th, 19th and 33rd/76th Foot) (Armoured Infantry)
1st Battalion, The Royal Welsh (Armoured Infantry)
Recent commanders have included:1956–1957 Brigadier I. H. Freeland
1970–1972 Brigadier D. T. Young
1972–1974 Brigadier W. R. Taylor
1984–1986 Brigadier J. J. Mackenzie
1989–1990 Brigadier J. M. F. C. Hall
1999–2002 Brigadier J. Cooper
2002–2003 Brigadier J. D. Shaw
2005–2007 Brigadier J. G. Lorimer
2007–2009 Brigadier D. M. Cullen