The Third Anglo-Afghan War began on 6 May 1919 when the Emirate of Afghanistan invaded British India and ended with an armistice on 8 August 1919. The Anglo-Afghan Treaty of 1919 resulted in the Afghans gaining control of foreign affairs from Britain, and the recognition of the Durand Line as the border between Afghanistan and British India.
The 55th Coke's Rifles (Frontier Force) 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 (Frontier Force) 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 6th Queen Elizabeth's Own Gurkha Rifles was a rifle regiment of the British Indian Army, before being transferred to the British Army following India's independence. Originally raised in 1817 as part of the army of the British East India Company, the regiment has been known by a number of names throughout its history. Initially the unit did not recruit from the Gurkhas, although after being transferred to the British Indian Army following the Indian Rebellion of 1857, it became a purely Gurkha regiment, in due course with its regimental headquarters at Abbottabad in the North West Frontier Province of British India. After 1947 the regiment was one of only four Gurkha regiments to be transferred to the British Army and this continued up until 1994, when it was amalgamated with other Gurkha regiments to form the Royal Gurkha Rifles. Over the course of its 177-year history, the regiment was awarded 25 battle honours, although prior to World War I it had only been awarded one and no battle honours were awarded to it after World War II.
The Indian Army, also called the British Indian Army, was involved in World War I as part of the British Empire. More than one million Indian troops served overseas, of whom more than 60,000 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 Indian Army and before 1895, the Bengal Army, that saw active service during World War I.
The 3rd (Lahore) Division was an infantry division of the Indian Army and before 1895, the Bengal 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 6th (Poona) Division was a division of the British Indian Army. It was formed in 1903, following the Kitchener reforms of the Indian Army.
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 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 42nd 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 served in the Mesopotamian Campaign on the Euphrates Front throughout its existence. It was not reformed for the Second World 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 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.
The Order of battle, Keren 1941 shows Italian army forces that participated in the Battle of Keren from February to March 1941 and British troops in Sudan on 20 January 1941, which participated in military operations against Eritrea during the East African Campaign 1940–1941.
British India 
British Indian Army