<P> In 1975 , the Prime Minister of Sikkim appealed to the Indian Parliament for Sikkim to become a state of India . In April of that year , the Indian Army took over the city of Gangtok and disarmed the Chogyal 's palace guards . Thereafter , a referendum was held in which 97.5 per cent of voters supported abolishing the monarchy , effectively approving union with India . India is said to have stationed 20,000 -- 40,000 troops in a country of only 200,000 during the referendum . On 16 May 1975 , Sikkim became the 22nd state of the Indian Union , and the monarchy was abolished . To enable the incorporation of the new state , the Indian Parliament amended the Indian Constitution . First , the 35th Amendment laid down a set of conditions that made Sikkim an `` Associate State '' , a special designation not used by any other state . A month later , the 36th Amendment repealed the 35th Amendment , and made Sikkim a full state , adding its name to the First Schedule of the Constitution . </P>
<P> In 1975 , the Prime Minister of Sikkim appealed to the Indian Parliament for Sikkim to become a state of India . In April of that year , the Indian Army took over the city of Gangtok and disarmed the Chogyal 's palace guards . Thereafter , a referendum was held in which 97.5 per cent of voters supported abolishing the monarchy , effectively approving union with India . India is said to have stationed 20,000 -- 40,000 troops in a country of only 200,000 during the referendum . On 16 May 1975 , Sikkim became the 22nd state of the Indian Union , and the monarchy was abolished . To enable the incorporation of the new state , the Indian Parliament amended the Indian Constitution . First , the 35th Amendment laid down a set of conditions that made Sikkim an `` Associate State '' , a special designation not used by any other state . A month later , the 36th Amendment repealed the 35th Amendment , and made Sikkim a full state , adding its name to the First Schedule of the Constitution . </P>
sikkim was made an integral part of india under which amendment
sikkim was made an integral part of india under which amendment
the 36th Amendment
the 36th Amendment