The Indian Army formed and dispatched seven expeditionary forces overseas during World War I. Force A was attached to the
British Expeditionary Force and the four divisions were formed into two
army corps: an infantry
Indian Corps and the
Indian Cavalry Corps. Upon arrival in
Marseille on 30 September 1914, only six weeks after the declaration of war, they were moved to the
Ypres Salient and took part in the
Battle of La Bassée in October 1914. In March 1915, the
7th (Meerut) Division was chosen to lead the assault in the
Battle of Neuve Chapelle. With morale low, many soldiers fled the scene of the battle and the infantry divisions were finally withdrawn to Mesopotamia in October 1915, when they were replaced by the new British divisions of Kitchener's Army. With the withdrawal of the infantry divisions, the only Indian Army units on the Western Front were the two cavalry divisions. In November 1916, the two Indian cavalry divisions were renumbered from
1st and
2nd to the 4th and 5th Cavalry Divisions. Serving alongside British cavalry divisions they were held behind the front line awaiting the hoped for breakthrough. At times during the war they served in the trenches as infantry, each cavalry brigade when dismounted formed a dismounted regiment. This meant that when the divisions went into the front line, they could only cover a brigade area. Before being themselves withdrawn to Egypt in March 1918, they took part in the
Battle of the Somme, the
Battle of Bazentin, the
Battle of Flers-Courcelette, the advance to the
Hindenburg Line and finally the
Battle of Cambrai. File:Hodsons Horse France 1917 IWM Q 2061.jpg| File:39th Garhwali Riflemen on the march in France (Photo 24-238).jpg| File:1-1 Gurkhas charging a trench (Photo 24-162).jpg| File:Indian officers, 39th Garhwalis (Photo 24-242).jpg| File:Meerut Cavalry Brigade on the march near Fenges, France (Photo 24-210).jpg| File:Indian cavalry marching through a French village Estrée Blanche (Photo 24-115) (cropped).jpg| File:Indian infantry in the trenches, prepared against a gas attack (Fauquissart, France). Photographer- H. D. Girdwood. (13875485043).jpg| File:Indian Army soldiers carry a wounded officer on a stretcher in France.jpg| File:The General Sir James Willcocks talking to Indian officers (Photo 24-167).jpg| File:Indian troops on the way to relieve French and American units 1918.jpg| File:IndianArmyMGCrewFlanders1914-15(1).jpg| File:Gentlemen of India marching to chasten German hooligans 1914.jpg| File:Group of all ranks 2-2 Gurkhas, 9th Gurkhas and 6th Jats (Photo 24-69).jpg| File:Indian Lancers near Vraignes 1917.jpg| File:The British Army on the Western Front, 1914-1918 Q9757.jpg|
Indian Expeditionary Force B In 1914, the Governor of
British East Africa requested assistance to deal with the German forces in
German East Africa and the problem was handed to the
India Office, which assembled two forces and shipped them to his aid. Indian Expeditionary Force B consisted of the
27th (Bangalore) Brigade, commanded by Brigadier General Richard Wapshare, from the
9th (Secunderabad) Division, and an
Imperial Service Infantry Brigade, commanded by Brigadier General
Michael Tighe, together with a pioneer battalion, a mountain artillery battery and engineers. It was shipped across the
Indian Ocean to invade
German East Africa. The force under the command of Major General
Arthur Aitken landed at
Tanga on 2–3 November 1914. In the following
Battle of Tanga, Aitken's 9,000 men were badly beaten by the 1,000 men under their German commander
Paul von Lettow-Vorbeck. The force re-embarked on 5 November 1914, having suffered 4,240 casualties and the loss of several hundred rifles, 16 machine guns and 600,000 rounds of ammunition. On 3 November 1914, some 1,500
Punjabis of the British force advanced up the slope at night near Longido were caught in the crossfire of a strong German defensive position as they advanced in the morning fog. The large force of Indian infantry effectively resisted counterattacks, however, during the day the British attackers made no headway and suffered substantial casualties. By mid-morning, a German mounted patrol ambushed a supply column and roughly 100 mules carrying water for the troops were stampeded away by the Germans. The British officers, with their now widely scattered troops, waited until darkness and having determined their situation to be untenable, withdrew down the mountain and marched back to British East Africa having accomplished nothing.
Indian Expeditionary Force D The largest Indian Army force to serve abroad was the Indian Expeditionary Force D in
Mesopotamia, under the command of
Lieutenant-General Sir John Nixon. Following this engagement, the Poona Division withdrew back to
Kut, where Townshend made the decision to hold the city and the
Siege of Kut began. Between January and March 1916, Townshend launched several attacks in an attempt to lift the siege. In sequence, the attacks took place at the
Battle of Sheikh Sa'ad, the
Battle of the Wadi, the
Battle of Hanna, and the
Battle of Dujaila Redoubt. In 1917, the British force, under
Frederick Stanley Maude, which now included one cavalry and seven infantry divisions from the Indian Army, in the
III Corps (India) The Mesopotamian campaign was largely an Indian Army campaign as the only British formations involved were the
13th (Western) Division and British battalions assigned to Indian brigades. In the campaign, 11,012 were killed, 3,985 died of wounds, 12,678 died of disease, 13,492 were either missing or prisoners (including the 9,000 prisoners from Kut), and 51,836 were wounded. File:Meso Campaign.jpg| File:Indian troops in the firing line, Mesopotamia, January 1915.jpg| File:The Mesopotamian Campaign, 1916-1918 Q25187.jpg| File:Indian Troops in New Street, Baghdad, 11 March 1917.jpg| File:The Mesopotamian Campaign, 1916-1918 Q25175.jpg| File:Indian soldiers of the 7th Meerut Division man trenches in Mesopotamia, 1917.jpg| File:The Service of Sergeant Percy Elgey With the 1-4th Somerset Light Infantry in India and Mesopotamia 1914-1918 HU95127.jpg|
Indian Expeditionary Force E Indian Expeditionary Force E consisted of the
22nd (Lucknow) Brigade sent to Egypt in October 1914. The designation was retained for all subsequent forces sent there. Two Indian cavalry divisions (
4th Cavalry Division and
5th Cavalry Division) transferred from France in 1918, for service in
Palestine. They were joined by the
15th Imperial Service Cavalry Brigade, a unit formed by three regiments of
Lancers from the princely states of
Mysore,
Hyderabad, and
Jodhpur. At the same time 36 Indian army battalions were sent to reinforce the British
10th (Irish),
53rd (Welsh),
60th (2/2nd London) and
75th Divisions, which were reformed on Indian division lines with one British and three Indian battalions per brigade. The 10th Division was disbanded in 1916, and its brigades assigned to other formations. The 11th Division was disbanded earlier in 1915, but its brigades did not survive much longer. the brigade was dispatched from Egypt and attached to the British
29th Division which had been decimated in the earlier battles. Held in reserve for the
Second Battle of Krithia they played a major part in the
Third Battle of Krithia. Advancing on the left the Brigade was quickly halted except along the Aegean shore where the 1/
6th Gurkha Rifles managed to advance. The
14th Ferozepore Sikhs, advancing along the floor of Gully Ravine, were almost wiped out, losing 380 men out of 514 and 80% of their officers. The Brigade was next involved in the
Battle of Gully Ravine and here the 2/
10th Gurkha Rifles managed to advance half a mile. The Brigade next took part in the
Battle of Sari Bair, under cover of a naval bombardment the 1/6th Gurkha Rifles assaulted and captured the hill, which was then shelled by the
Royal Navy. With their casualties mounting and under command of the battalion medical officer they were forced to withdraw to their starting positions. With the failure of the assault at Sari Bair the brigade was withdrawn to Egypt. Over the duration of the campaign the 29th Brigade had suffered 1,358 dead and 3,421 wounded. Peter Stanley's book
Die in Battle, Do not Despair: the Indian on Gallipoli, 1915 (Helion & Co. Solihul, 2015) shows that a total of 16,000 troops passed through Force G, and that it suffered about 1623 fatal casualties, listed in his book by name. File:Troops of 29th Indian Infantry Brigade disembarking from a boat, Gallipoli, 1915.jpg| File:Indian Mountain Battery at Anzac Cove.jpg| File:Indian soldiers in trench, Gallipoli,1915.jpg| File:Indian mule team at Anzac, Gallipoli, 1915.jpg| File:Indian and Anzac troops at Anzac Cove, 1915.jpg| File:Troops of 29th Indian Infantry Brigade in the trenches, Gallipoli, 1915.jpg| File:Gurkha soldiers of 29th Indian Brigade in Gallipoli 1915.jpg| ==Other operations==