Indian Army

The Indian Army (IA) (ISO: Bhāratīya Sēnā) is the land-based branch and largest component of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Army, and its professional head is the Chief of the Army Staff (COAS). The Indian Army was established on 1 April 1895 alongside the long established presidency armies of the East India Company, which too were absorbed into it in 1903. Some princely states maintained their own armies which formed the Imperial Service Troops which, along with the Indian Army formed the land component of the Armed Forces of the Crown of India, responsible for the defence of the Indian Empire. The Imperial Service Troops were merged into the Indian Army after independence. The units and regiments of the Indian Army have diverse histories and have participated in several battles and campaigns around the world, earning many battle and theatre honours before and after Independence.

The primary mission of the Indian Army is to ensure national security and national unity, to defend the nation from external aggression and internal threats, and to maintain peace and security within its borders. It conducts humanitarian rescue operations during natural calamities and other disturbances, such as Operation Surya Hope, and can also be requisitioned by the government to cope with internal threats. It is a major component of national power, alongside the Indian Navy and the Indian Air Force. The independent Indian army has been involved in four wars with neighbouring Pakistan and one with China. It has emerged victorious in all wars against Pakistan. Other major operations undertaken by the army include Operation Vijay, Operation Meghdoot, and Operation Cactus. The army has conducted large peacetime exercises such as Operation Brasstacks and Exercise Shoorveer, and it has also been an active participant in numerous United Nations peacekeeping missions. The Indian Army was a major force in the First and Second World Wars, particularly in the Western Front and the Middle Eastern theatre during World War I, and the South-East Asian Theatre and the East African and North African campaigns during World War II.

The Indian Army is operationally and geographically divided into seven commands, with the basic field formation being a division. The army is an all-volunteer force and comprises more than 80% of the country's active defence personnel. It is the largest standing army in the world, with 1,248,000 active troops and 960,000 reserve troops. The army has embarked on an infantry modernisation program known as Futuristic Infantry Soldier As a System (F-INSAS), and is also upgrading and acquiring new assets for its armoured, artillery, and aviation branches.

Until the independence of India, the "Indian Army" was a British-commanded force defined as "the force recruited locally and permanently based in India, together with its expatriate British officers"; the "British Army in India" referred to British Army units posted to India for a tour of duty. The "Army of India" meant the combined Indian Army and the British Army in India.

In 1776, a Military Department was created within the government of the East India Company at Calcutta. Its main function was to record orders that were issued to the army by various departments of the East India Company for the territories under its control.

With the Charter Act 1833, the Secretariat of the government of the East India Company was reorganised into four departments, including a Military Department. The army in the presidencies of Bengal, Bombay and Madras functioned as respective Presidency Armies until 1 April 1895, when they were unified into a single force known as the Indian Army. For administrative convenience, it was divided into four commands, namely Punjab (including the North West Frontier), Bengal, Madras (including Burma), and Bombay (including Sind, Quetta and Aden).

The Indian Army was a critical force for maintaining the primacy of the British Empire, both in India and throughout the world. Besides maintaining internal security, the Army fought in many other theatres: Third Anglo-Afghan war; the Boxer Rebellion in China; in Abyssinia and in the First and Second World Wars.

The Kitchener Reforms brought the British Army to a new century. In the 20th century, the Indian Army was a crucial adjunct to the forces of the British Empire in both world wars. 1.3 million Indian soldiers served in World War I (1914–1918) with the Allies, in which 74,187 Indian troops were killed or missing in action.^{[failed verification]} In 1915 there was a mutiny by Indian soldiers in Singapore. The United Kingdom made promises of self-governance to the Indian National Congress in return for its support but reneged on them after the war, following which the Indian Independence movement gained strength.