The Indian armed forces have been engaged in a number of major military operations, including: the Indo-Pakistani wars of 1947, 1965 and 1971, the Portuguese-Indian War, the Sino-Indian War, the 1967 Chola incident, the 1987 Sino-Indian skirmish, the Kargil War, and the Siachen conflict among others. India honours its armed forces and military personnel annually on Armed Forces Flag Day, 7 December. Since 1962, the IAF has maintained close military relations with Russia, including cooperative development of programmes such as the Fifth Generation Fighter Aircraft (FGFA) and the Multirole Transport Aircraft (MTA). Armed with the nuclear triad, the Indian armed forces are steadily undergoing modernisation, with investments in areas such as futuristic soldier systems and missile defence systems.