Arjan Singh (98), who led the Indian Air Force in the 1965 India-Pakistan War, has passed in New Delhi on September 16, 2017. Throughout the 1965 war, Singh showed exemplary leadership, and was awarded the Padma Vibhushan for his leadership during the war and subsequently the rank of the CAS was upgraded to that of Air Chief Marshal. Thus, Singh became the first Air Chief Marshal of the Indian Air Force. Till date, he is the only Air Force officer to have been promoted to the five-star rank. After his retirement in July 1969, he was appointed Indian ambassador to Switzerland.