The Indian Rebellion of 1857 was almost entirely confined to the Bengal Army. Of the thirty-two Bombay infantry regiments in existence at the time only two mutinied. After some initial uncertainty as to the loyalty of the remainder, it was deemed possible to send most of the British troops in the Presidency to Bengal, while the Bombay sepoy and sowar (cavalry) units held the southern districts of the North-West Frontier. Some Bombay units saw active service during the repression of the rebellion in Central India.