 In 1991, when, following the dissolution of the USSR the Armenian Republic was founded, hostile relations with the neighboring Azerbaijan Republic and the Nagorno-Karabakh War have been marked as being the most important military matters in Armenia.An Armenian Hellenistic state was founded in 190 BC and ruled by the Artaxiad Dynasty.At the height of its power, Greater Armenia spread over parts of what is today the Caucasus, Turkey, Syria, and Lebanon.