1st Mechanized Brigade (United Kingdom)

1st (Guards) Brigade 1st Brigade 1st Infantry Brigade (Guards) 1st Infantry Brigade 1st Mechanized Brigade 1st Armoured Infantry Brigade
Insignia of the 1st Armoured Infantry Brigade.
Active	1899–present day
Country	United Kingdom
Branch	British Army
Type	Mechanized Infantry
Size	Brigade
Part of	3rd (United Kingdom) Division
Garrison/HQ	Delhi Barracks, Tidworth Camp
Engagements	First World War Battle of Mons First Battle of the Marne First Battle of the Aisne First Battle of Ypres Battle of Aubers Ridge Battle of Loos Battle of the Somme (1916) Battle of Pozières Third Battle of Ypres Battle of Épehy Second World War Battle of France Fondouk El Kourzia Tunis Battle of Monte Cassino Liri Valley -
Commanders
Current commander	Brigadier Simon Wright

The 1st Armoured Infantry Brigade is an infantry brigade of the British Army with a long history including service during both World War I and World War II. It is based at Tidworth Camp.

Previously it has been designated 1st (Guards) Brigade, 1st Infantry Brigade, 1st Mechanised Brigade (from the 1990s), and under Army 2020 will take up the 1st Armoured Infantry Brigade title.

Initially designated as the 1st (Guards) Brigade, the brigade was part of 1st Division during the First World War. Upon creation of the Guards Division in August 1915, the brigade lost 1st Battalion, Coldstream Guards and 1st Battalion, Scots Guards, both to 2nd Guards Brigade, and was redesignated without the Guards reference in its title as the 1st Brigade. It was with the 1st Division on the Western Front throughout the war. It saw action at the Battle of Mons and subsequent Great Retreat, the First Battle of the Marne, the First Battle of the Aisne, the First Battle of Ypres, the Battle of Loos, the Battle of Aubers Ridge, the Battle of the Somme, the Battle of Passchendaele, the Battle of Pozières and the Battle of Épehy, part of the final Hundred Days Offensive, which broke the back of the German Army, leading to an Armistice.