India has one of the largest and most advanced defense systems in the world. It has the third largest military force and is the largest importer of arms globally. The defense forces consist of the army, navy, air force, and coast guard. The army and air force each have multiple commands while the navy has four commands. Key weapons in India's arsenal include nuclear submarines, aircraft carriers, missiles like the Brahmos, and indigenous fighter jets like the Tejas. India also regularly conducts joint military exercises with major world powers.