Pakistan 's development of nuclear weapons began in 1972 , following the Indo-Pakistani War of 1971 , with the government adopting a policy of deliberate ambiguity which was practised and observed from 1972 to 1998 . Amid pressure built after India 's nuclear test in 1998 , Pakistan successfully conducted its first publicly announced nuclear tests in 1998 : Chagai-I and Chagai-II . With these tests , Pakistan became the seventh nation to achieve the status of a nuclear power
India 's nuclear test
Pokhran-II
Pakistan Armed Forces