What type of details about mohammad khan qajar  can be gathered from the following bio?  Bio: Āghā moḥammad khān qājār -lrb- 1742 -- 1797 ; -rrb- was the founder of the qajar dynasty of iran , ruling from 1789 to 1797 as king -lrb- shah -rrb- . he was originally chieftain of the qoyunlu branch of the qajar tribe . in 1789 , agha mohammad khan was enthroned as the king of iran , but was not officially crowned as its king until march 1796 . on june 17 , 1797 agha mohammad khan was assassinated , and was succeeded by his nephew , fath-ali shah qajar . agha mohammad khan 's reign is noted for the reemergence of a centrally led and united iran . following the death of nader shah , many of the iranian territories in the caucasus that had been ruled by the various subsequent iranian dynasties since 1501 , today comprising georgia , dagestan , azerbaijan , and armenia had broken apart into various caucasian khanates or had declared de facto independance as in georgia 's case . after 48 years , they were all reconquered by agha mohammad khan . some of his reconquest 's were even for that time , exceptionally cruel , such as his resubjugation of georgia , where he sacked the capital tblisi and massacred many of its inhabitants , and moving away some 15,000 georgian captives back to mainland iran . agha mohammad khan is also noted for moving the capital to tehran , where it still stands as of today .

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