Madras Army in the context of "Government of India Act 1858"

The presidency armies were the armies of the three presidencies of the East India Company's rule in India, later the forces of the British Crown in India, composed primarily of Indian sepoys. The presidency armies were named after the presidencies: the Bengal Army, the Madras Army and the Bombay Army. Initially, only Europeans served as commissioned or non-commissioned officers. In time, Indian Army units were garrisoned from Peshawar in the north, to Sind in the west, and to Rangoon in the east. The army was engaged in the wars to extend British control in India (the Mysore, Maratha and Sikh wars) and beyond (the Burma, Afghan, First and Second Opium Wars, and the Expedition to Abyssinia).

The presidency armies, like the presidencies themselves, belonged to the Company until the Indian Rebellion of 1857, when the Crown took over the Company and its three armies. In 1895, the three presidency armies were merged into a united Indian Army.

The Indian Army during British rule, also referred to as the British Indian Army, was the main military force of India until national independence in 1947. Formed in 1895 by uniting the three Presidency armies, it was responsible for the defence of both British India and the princely states, which could also have their own armies. As stated in the Imperial Gazetteer of India, the "British Government has undertaken to protect the dominions of the Native princes from invasion and even from rebellion within: its army is organized for the defence not merely of British India, but of all possessions under the suzerainty of the King-Emperor." The Indian Army was a vital part of the British Empire's military forces, especially in World War I and World War II.

The Indian Presidency armies were originally under East India Company command, and comprised the Bengal Army, Madras Army, and Bombay Army. After the Indian Rebellion of 1857, all company troops were transferred to the British Crown. In 1879, the Presidency armies were integrated into a system of four Commands with a central Commander-in-Chief. On 1 April 1895, the Presidency armies were dissolved and unified into a single Indian Army, also divided into four Commands, and the term "Indian Army" was officially used by 1903. The Commands were later replaced by two "Armies" in 1908—the Northern and Southern Army—but the Command system was restored in 1920.