The 9th (Scottish) Division, was an infantry division of the British Army during the First World War, one of the Kitchener's Army divisions raised from volunteers by Lord Kitchener to serve on the Western Front during the First World War.
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 11th (Northern) Division, was an infantry division of the British Army during the First World War, raised from men who had volunteered for Lord Kitchener's New Armies. The division fought in the Gallipoli Campaign and on the Western Front. The division's insignia was an ankh or ankhus.
The 14th (Light) Division was an infantry division of the British Army, one of the Kitchener's Army divisions raised from volunteers by Lord Kitchener during the First World War. All of its infantry regiments were originally of the fast marching rifle or light infantry regiments, hence the title "Light". It fought on the Western Front for the duration of the First World War.
The division was disbanded by March 1919, and was not reformed in the Second World War.
The 27th Division was an infantry division of the British Army raised during the Great War, formed in late 1914 by combining various Regular Army units that had been acting as garrisons about the British Empire. The division spent most of 1915 on the Western Front in France before moving to Salonika where it remained with the British Salonika Army for the duration of the war. In 1916 its commander Hurdis Ravenshaw was captured by an Austrian submarine whilst sailing to England. In 1918 in Salonika the division took part in the Battle of Doiran. It carried out occupation duties in the Caucasus in the post-war before being withdrawn from the region in 1919.
The 24th Division was an infantry division of the British Army, raised in September 1914 from men volunteering for Lord Kitchener's New Armies during the First World War. After almost a year spent training in England the division was sent to the Western Front between August and September 1915. It served in Belgium and France in the trenches of the Western Front for the duration of the war.
The 17th (Northern) Division was an infantry division of the British Army, a Kitchener's Army formation raised during the Great War.
The 34th Division was an infantry division of the British Army that was raised in 1914, during the First World War. The division was raised from volunteers for Lord Kitchener's New Armies, that was originally made up of infantry battalions raised by public subscription or private patronage. The division was taken over by the War Office in September 1915. It served in France and Belgium in the trenches of the Western Front for the duration of the war.
The 21st Division was an infantry division of the British Army during World War I, raised in September 1914 by men volunteering for Lord Kitchener's New Armies. The division moved to France in September 1915 and served on the Western Front for the duration of the First World War. The divisional insignia was the "triple-seven".
The British 30th Division was a New Army division that was originally made up of battalions raised by public subscription or private patronage. The division was taken over by the British War Office in August 1915 and moved to France in December. It served on the Western Front for the duration of the First World War.
The 32nd Division was an infantry division of the British Army that was raised in 1914, during the First World War. The division was raised from volunteers for Lord Kitchener's New Armies, made up of infantry 'Pals battalions' and artillery brigades raised by public subscription or private patronage. The division was taken over by the War Office in September 1915. It served in France and Belgium in the trenches of the Western Front for the duration of the war. It saw action at the Battle of the Somme, the Pursuit to the Hindenburg Line, the Defence of Nieuport, the German spring offensive, and the Allied Hundred Days Offensive beginning at the Battle of Amiens. After the Armistice it marched into Germany as part of the Army of Occupation.
The 19th (Western) Division was an infantry division of the British Army, part of Kitchener's Army, formed in the Great War.
The 33rd Division was an infantry division of the British Army that was raised in 1914, during the First World War. The division was raised from volunteers for Lord Kitchener's New Armies, that was originally made up of infantry battalions raised by public subscription or private patronage. The division was taken over by the War Office in September 1915. It served in France and Belgium in the trenches of the Western Front for the duration of the war. The division's insignia was the "double-three" from a set of dominoes.
The 40th Division was an infantry division of the British Army active during the First World War, where it served on the Western Front. It was a division of Lord Kitchener's New Army volunteers, mostly "bantam" recruits of below regulation height. It was later briefly reformed as a deception formation in the Second World War, and during the early years of the Cold War was recreated a third time to garrison Hong Kong.
The 25th Division was an infantry division of the British Army, raised as part of Lord Kitchener's Third New Army (K3) in September 1914, shortly after the outbreak of the Great War. It served on the Western Front for most of the war.
The 26th Division was an infantry division of the British Army during World War I. The division was created in September 1914 from men volunteering for Lord Kitchener's New Armies and was the last division to be raised under the K3 enlistment scheme. Although the 26th Division began to assemble in September 1914, it was not fully deployed on the Western Front until the following year. In November 1915, the division was redeployed to the Macedonian Front, where it remained until the end of the war.
The 37th Division was an infantry division of the British Army, raised during the First World War. The divisional symbol was a gold horseshoe, open end up.
221st Mixed Brigade was a Scottish Home Service formation of the British Army that served under various titles throughout World War I.
The 223rd Brigade was a Home Defence formation of the British Army in the First and the Second World Wars. It existed under several variations of the 223 Brigade title, and was eventually converted into an airborne formation.
This is an order of battle listing the Allied and Ottoman forces involved in the Gallipoli campaign during 1915.
United Kingdom 
British Army 