The 10th (Irish) Division, was one of the first of Kitchener's New Army K1 Army Group divisions, authorized on 21 August 1914, after the outbreak of the Great War. It included battalions from the various provinces of Ireland. It was led by Irish General Bryan Mahon and fought at Gallipoli, Salonika and Palestine. It was the first of the Irish Divisions to take to the field and was the most travelled of the Irish formations. The division served as a formation of the United Kingdom's British Army during World War I.
The 29th Division, known as the Incomparable Division, was an infantry division of the British Army, formed in early 1915 by combining various Regular Army units that had been acting as garrisons around the British Empire. Under the command of Major-General Aylmer Hunter-Weston, the division fought throughout the Gallipoli Campaign, including the original landing at Cape Helles. From 1916 to the end of the war the division fought on the Western Front in Belgium and France.
The 54th Infantry Division was an infantry division of the British Army. The division was raised in 1908 following the creation of the Territorial Force (TF) as the East Anglian Division. During the First World War the division fought at Gallipoli and in the Middle East. The division was disbanded after the war but reformed in the Territorial Army in 1920. During the Second World War it was a home service division and did not see any combat service abroad and was disbanded in late 1943 but many of its component units went to see service in the Normandy Campaign and North-western Europe from June 1944 to May 1945.
The Lancashire Fusiliers was a line infantry regiment of the British Army that saw distinguished service through many years and wars, including the Second Boer War, the First and Second World Wars, and had many different titles throughout its 280 years of existence. In 1968 the regiment was amalgamated with the other regiments of the Fusilier Brigade – the Royal Northumberland Fusiliers, Royal Warwickshire Fusiliers and the Royal Fusiliers – to form the current Royal Regiment of Fusiliers.
The Essex Regiment was a line infantry regiment of the British Army in existence from 1881 to 1958. The regiment served in many conflicts such as the Second Boer War and both World War I and World War II, serving with distinction in all three. It was formed in 1881 under the Childers Reforms by the amalgamation of the 44th Regiment of Foot and the 56th Regiment of Foot.
The Welch Regiment was an infantry regiment of the line of the British Army in existence from 1881 until 1969. The regiment was created in 1881 under the Childers Reforms by the amalgamation of the 41st (Welch) Regiment of Foot and 69th Regiment of Foot to form the Welsh Regiment, by which it was known until 1920 when it was renamed the Welch Regiment. In 1969 the regiment was amalgamated with the South Wales Borderers to form the Royal Regiment of Wales.
The South Lancashire Regiment was a line infantry regiment of the British Army in existence from 1881 to 1958.
The 163rd Infantry Brigade was an infantry brigade of the British Army that saw active service during the First World War in Gallipoli and the Middle Eastern Theatre as part of the 54th Division. In the Second World War the brigade remained in the United Kingdom until it was disbanded in late 1943.
The 167th Brigade was an infantry formation of the British Territorial Army that saw active service in both the First and Second World Wars. It was the first Territorial formation to go overseas in 1914, garrisoned Malta, and then served with the 56th (London) Infantry Division on the Western Front. In the Second World War, it fought in the North African and Italian campaigns in the Second World War.
The Middlesex Regiment (Duke of Cambridge's Own) was a line infantry regiment of the British Army in existence from 1881 until 1966. The regiment was formed, as the Duke of Cambridge's Own (Middlesex Regiment), in 1881 as part of the Childers Reforms when the 57th (West Middlesex) and 77th (East Middlesex) Regiments of Foot were amalgamated with the county's militia and rifle volunteer units.
The Suffolk Regiment was an infantry regiment of the line in the British Army with a history dating back to 1685. It saw service for three centuries, participating in many wars and conflicts, including the First and Second World Wars, before being amalgamated with the Royal Norfolk Regiment to form the 1st East Anglian Regiment in 1959 which, in 1964, was further amalgamated with the 2nd East Anglian Regiment, the 3rd East Anglian Regiment and the Royal Leicestershire Regiment to create the present Royal Anglian Regiment.
The Worcestershire Regiment was a line infantry regiment in the British Army, formed in 1881 under the Childers Reforms by the amalgamation of the 29th (Worcestershire) Regiment of Foot and the 36th (Herefordshire) Regiment of Foot. The regiment fought in many conflicts, including both the First and Second World Wars, until 1970, when it was amalgamated with the Sherwood Foresters to form the Worcestershire and Sherwood Foresters Regiment. In September 2007, the regiment amalgamated with the Cheshire Regiment and the Staffordshire Regiment to form the Mercian Regiment.
The Royal Berkshire Regiment (Princess Charlotte of Wales's) was a line infantry regiment of the British Army in existence from 1881 until 1959. The regiment was created in 1881, as the Princess Charlotte of Wales's (Royal Berkshire Regiment), by the amalgamation of the 49th (Princess Charlotte of Wales's) (Hertfordshire) Regiment of Foot and the 66th (Berkshire) Regiment of Foot. In 1921, it was renamed the Royal Berkshire Regiment (Princess Charlotte of Wales's).
The 168th Brigade was an infantry brigade formation of the British Army that saw service during both the First and the Second World Wars. Throughout its existence, serving under many different titles and designations, the brigade was an integral part of the 56th (London) Infantry Division. It served on the Western Front during First World War and in the Italian Campaign during the Second World War. It was finally disbanded in the 1960s.
A large regiment is a multi-battalion infantry formation of the British Army. First formed in the 1960s, large regiments are the result of the amalgamation of a number of existing single-battalion regiments, and perpetuate the traditions of each of the predecessor units.
The Herefordshire Light Infantry was an infantry regiment of the British Army in existence from 1861 to 1967. The regiment had no lineal connection with the 36th (Herefordshire) Regiment of Foot.
The East Midland Brigade was an infantry brigade of the Territorial Force, part of the British Army, that was raised in 1908. As the name suggests, it commanded infantry battalions recruited in the East Midlands of England: Bedfordshire, Northamptonshire, Cambridgeshire and Hertfordshire. The brigade was an integral part of the East Anglian Division.
The 169th Brigade was an infantry brigade of the British Army that saw active service in both the First and the Second World Wars. Throughout its existence the brigade, serving under numerous many different titles and designations, was an integral part of the 56th (London) Infantry Division. It served on the Western Front in the First World War, and in the North African and Italian campaigns during the Second World War.
The Essex Brigade, later 161st Brigade and 161st Infantry Brigade, was a volunteer infantry formation of the British Army in existence from 1888 until 1941, and again from 1947. It served at Gallipoli and in Palestine during the First World War and returned to Egypt in the early part of the Second World War before transferring to the British Indian Army and redesignated 161st Indian Infantry Brigade. In peacetime and during the wars the brigade was an integral part of the 54th Infantry Division and contained mostly battalions of the Essex Regiment.
The London Rifle Brigade was a volunteer regiment of the British Army.
United Kingdom 
Territorial Force/Territorial Army 