The Namgyal dynasty continued in Sikkim from 1542 until 1975 , when the kingdom voted by plebiscite to join the union of India .
Ladakh became a region within the Indian state of Jammu and Kashmir .
The Namgyal dynasty continued in Sikkim from 1542 until 1975 , when the kingdom voted by plebiscite to join the union of Indian .
Ladakh became a region within the Indian state of Jammu and Kashmir .