The National Defence Academy (NDA) is the Joint Services academy of the Indian Armed Forces, where cadets of the three services, the Army, the Navy and the Air Force train together before they go on to pre-commissioning training in their respective service academies. The NDA is located at Khadakwasla near Pune, Maharashtra. It is the first tri-service academy in the world.
The NDA campus is located about 17 km south-west of Pune city, north-west of Khadakwasla Lake. It spans 7,015 acres (28.39 km2) of the 8,022 acres (32.46 km2) donated by the Government of the former Bombay State. The site was chosen for being on a lake shore, the suitability of the neighbouring hilly terrain, proximity to the Arabian Sea and other military establishments, an operational air base nearby at Lohegaon as well as the salubrious climate. The existence of an old combined-forces training centre and a disused mock landing ship, HMS Angostura, on the north bank of the Khadakwasla lake which had been used to train troops for amphibious landings, lent additional leverage for the selection of the site.