India conducted its first nuclear weapons test in 1974 and carried out further underground testing in 1998 .
China 's nuclear test of 1964 , as well as its repeated threats to intervene in support of Pakistan in the 1965 war , convinced India to develop nuclear weapons .
India conducted India 's first nuclear weapons test in 1974 and carried out further underground testing in 1998 .
China 's nuclear test of 1964 , as well as its repeated threats to intervene in support of Pakistan in the 1965 war , convinced India to develop nuclear weapons .