The North-West Frontier was a region of the British Indian Empire. It remains the western frontier of present-day Pakistan, extending from the Pamir Knot in the north to the Koh-i-Malik Siah in the west, and separating the modern Pakistani frontier regions of North-West Frontier Province, Federally Administered Tribal Areas and Balochistan from neighbouring Afghanistan in the west. The borderline between is officially known as the Durand Line and divides Pashtun inhabitants of these provinces from Pashtuns in eastern Afghanistan.
The 55th Coke's Rifles was a regiment of the British Indian Army. It was raised in 1849 as the 1st Regiment of Punjab Infantry. It was designated as the 55th Coke's Rifles in 1903 and became 1st Battalion (Coke's) 13th Frontier Force Rifles in 1922. In 1947, it was allocated to the Pakistan Army, where it continues to exist as 7th Battalion The Frontier Force Regiment.
The Indian Army during World War I contributed a large number of divisions and independent brigades to the European, Mediterranean, Middle East and African theatres of war in World War I. Over one million Indian troops served overseas, of whom 62,000 died and another 67,000 were wounded. In total at least 74,187 Indian soldiers died during the war.
The 15th Indian Division was an infantry division of the British Indian Army that saw active service in the First World War. It served in the Mesopotamian Campaign on the Euphrates Front throughout its existence. It did not serve in the Second World War, but was reformed at Dehradun in 1964 as part of the post-independence Indian Army.
The 7th (Meerut) Division was an infantry division of the British Indian Army that saw active service during World War I.
The 3rd (Lahore) Division was an infantry division of the British Indian Army, first organised in 1852. It saw service during World War I as part of the Indian Corps in France before being moved to the Middle East where it fought against troops of the Ottoman Empire.
The 2nd (Rawalpindi) Division was a regular army division of the British Indian Army. It was formed in 1903 after the Kitchener reforms of the Indian Army. During World War I it remained in India for local defence but it was mobilised for action on the North West Frontier on several occasions during the period. The Division was mobilised in 1919 for service during the Third Afghan War.
The 8th (Lucknow) Division was a formation of the British Indian Army's Northern Army that was first formed as a result of the Kitchener reforms of the Indian Army in 1903. The Division remained in India on internal security duties during World War I, though the 8th (Lucknow) Cavalry Brigade was transferred to the 1st Indian Cavalry Division and served in France on the Western Front, and the 22nd Lucknow Infantry Brigade served as part of the 11th Indian Division in Egypt.
The 18th Indian Division was an infantry division of the British Indian Army that saw active service in the First World War. It took part in the Mesopotamian campaign and formed part of the occupation force for Iraq post-war. The division was not reformed for the Second World War.
The 56th Punjabi Rifles was an infantry regiment of the British Indian Army. It was raised in 1849 as the 2nd Regiment of Punjab Infantry. It was designated as the 56th Punjabi Rifles in 1906 and became 2nd Battalion 13th Frontier Force Rifles in 1922. In 1947, it was allocated to the Pakistan Army, where it continues to exist as 8th Battalion The Frontier Force Regiment.
The 1st (Risalpur) Cavalry Brigade was a cavalry brigade of the British Indian Army formed in 1906 as a result of the Kitchener Reforms. It remained in India during the First World War but took an active part in the Third Anglo-Afghan War in 1919.
The 11th Gurkha Rifles was a Gurkha regiment of the British Indian Army. It was formed in Mesopotamia and Palestine in May 1918, saw active service in the First World War and the Third Anglo-Afghan War, and was disbanded in April 1922.
The 54th Indian Brigade was an infantry brigade of the British Indian Army that saw active service with the Indian Army during the First World War. It took part in the Mesopotamian campaign and formed part of the occupation force for Iraq post-war. It was not reformed for the Second World War.
The 37th Indian Brigade was an infantry brigade of the British Indian Army that saw active service with the Indian Army during the First World War. It took part in the Mesopotamian campaign and was disbanded shortly after the end of the war.
The 28th Indian Brigade was an infantry brigade of the British Indian Army that saw active service with the Indian Army during the First World War. Formed in October 1914, it defended the Suez Canal in early 1915, ended the Ottoman threat to Aden in July 1915, took part in the Mesopotamian Campaign in 1916 and 1917, before finishing the war in the Sinai and Palestine Campaign. It remained in Palestine until it was broken up in 1920.
The 57th Indian Brigade was an infantry brigade of the British Indian Army that was active in the Indian Army during the First World War and took part in the Third Anglo-Afghan War in 1919. It was not reformed for the Second World War.
The 150th Infantry was an infantry regiment of the British Indian Army. It was formed in Mesopotamia in May 1918, saw service in the First World War and the Third Anglo-Afghan War, and was disbanded in June 1921.
The 154th Infantry was an infantry regiment of the British Indian Army. It was formed in Mesopotamia in May 1918, saw service in the First World War and the Third Anglo-Afghan War, and was disbanded in May 1921.
The 151st Sikh Infantry – also designated 151st Punjabi Rifles, see nomenclature (below) – was an infantry regiment of the British Indian Army. It was formed in Mesopotamia and Palestine in May 1918, saw active service in the First World War and the Third Anglo-Afghan War, and was disbanded in May 1921.
British India 
British Indian Army 