<Tr> <Th_colspan="2"> Test chronology </Th> </Tr> <Tr> <Td_colspan="2"> ← Pokhran - I (Operation Smiling Buddha) </Td> </Tr> <P> Pokhran - II was the series of five nuclear bomb test explosions conducted by India at the Indian Army's Pokhran Test Range in May 1998 . It was the second Indian nuclear test; the first test, code - named Smiling Buddha, was conducted in May 1974 . </P> <P> Pokhran - II consisted of five detonations, of which the first was a fusion bomb and the remaining four were fission bombs . These nuclear tests resulted in a variety of sanctions against India by a number of major states, including Japan and the United States . </P>

When did pokhran ii nuclear tests take place