West Sikkim is the site of the ancient state capital Yuksom. West Sikkim It served as Sikkim's capital beginning in 1642 for almost 50 years until it was shifted to Rabdentse. The district was under the occupation of the Nepalese for 30 years in the eighteenth and nineteenth centuries. After Anglo-Nepalese War (1814–16), the district was returned to Sikkim.