Himalayan Buddhist monarchy ruled by the Namgyal dynasty, becoming a British then Indian protectorate before merging fully into India.
Became an Indian protectorate in 1950; annexed as the 22nd state of India after a 1975 referendum ended the monarchy on 16 May 1975.
The atlas holds 2 border frames for Kingdom of Sikkim — the shape you scrub through changes in 1642 · 1729.
Verified via Open Library (author + title + year match); covers the British-protectorate era in detail.
History of the kingdom of Sikkim.