The Regiment of Artillery is a combat/fighting arm of the Indian Army, which provides massive firepower during all ground operations of the Indian Army. It is a successor to the Royal Indian Artillery (RIA) of British Indian Army, which itself traces its origins to the formation of Bombay Artillery in 1827. Today, it is the second-largest arm of the Indian Army, and with its guns, mortars, rocket launchers, unmanned aerial vehicles, surveillance systems, missiles and artillery firepower. It constitutes almost one-sixth of its total strength.