Daga tushen ikonsa a tsakiyar Bhutan, Ugyen Wangchuck ya kayar da abokan hamayyarsa na siyasa kuma ya haɗa ƙasar bayan yaƙe-yaƙe da tawaye da yawa a cikin 1882<unk>85.A cikin 1907, shekara mai mahimmanci ga ƙasar, Ugyen Wangchuck ya yanke shawara a matsayin sarki na gado na ƙasar ta hanyar Lhengye Tshogzim na manyan mabiya addinin Buddha, jami'an gwamnati, da shugabannin manyan iyalai, tare da tsayayyar buƙata ta Gong Ugyen Dorji. John Claude White, Wakilin Siyasa a Burtaniya, ya ɗauki hotuna na mulkin mallaka a Bhutan. Gwamnatin Burtaniya ta amince da mulkin mallaka na Bhutan nan da nan, ya zama sabon sarkin Bhutan a cikin watan Yuli na shekara ta 1910. Bayan mutuwar mahaifinsa a watan Yuli na shekara ta 1947, ya sanya hannu a kan yarjejeniyar da aka yi da Bhutan a ranar 8 ga watan Agusta na shekara ta 1953, wanda ya ba shi damar yin amfani da mulkin mallaka a matsayin sabon mulkin mallaka.
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