The National Coalition Government of the Union of Burma (Burmese: ပြည်ထောင်စုမြန်မာနိုင်ငံ အမျိုးသားညွန့်ပေါင်းအစိုးရ [pjìdàʊɰ̃zṵ mjəmà nàɪɰ̃ŋàɰ̃ əmjóðá ɲʊ̰ɰ̃báʊɰ̃ əsója̰]; NCGUB) was an administration which claimed to be the government in exile of Burma (Myanmar). It had its headquarters in Rockville, Maryland, United States. It was formally established in December 1990, with Sein Win as its first prime minister. It was dissolved in September 2012.