1st Army Tank Brigade (United Kingdom)

{{Short description|Tank Brigade of the British Army during the Second World War}}

{{Use dmy dates|date=February 2025}}

{{more citations needed|date=January 2017}}

{{Infobox military unit

| unit_name = 1st Army Tank Brigade

| image = 1st Army Tank Brigade Formation Badge.svg

| image_size = 75px

| caption = Brigade insignia

| dates = 3 September 1939 – November 1944

| country = {{flag|United Kingdom}}

| branch = {{army|United Kingdom}}

| type = Armoured formation

| role = Armoured warfare

| size = Brigade

| command_structure = BEF

| battles = * Battle of France

• Operation Crusader

}}

The 1st Army Tank Brigade was a formation of the British Army during the Second World War. A Tank Brigade was intended to support the Infantry and was mostly equipped with slow moving Infantry tanks, unlike an Armoured Brigade, which was equipped with faster cruiser tanks and later its own motorised infantry. Initially using infantry nomenclature for its smaller units, company and section and having 175 light and infantry tanks, it later adopted cavalry nomenclature of squadron and troop and later in the War grew to 240 tanks.Joslen pp. 138–139, 192–194 Its designation was changed on 14 April 1940 to 1st Tank Brigade.{{cite book |title=Armoured Warfare in the British Army 1939-1945 |last=Taylor |first=Dick |ISBN=9781399081030 |publisher=Pen & Sword Military |date=2022 |page=282}}