The Indian Air Force is the air arm of the Indian armed forces. Its primary responsibility is to secure Indian airspace and to conduct aerial warfare during a conflict. It was officially established on 8 October 1932 as an auxiliary air force of the Indian Empire and the prefix Royal was added in 1945 in recognition of its services during World War II. After India achieved independence from the United Kingdom in 1947, the Royal Indian Air Force served the Union of India, with the prefix being dropped when India became a republic in 1950.