officially the Republic of Azerbaijan

Azerbaijan (i/ˌæzərbaɪˈdʒɑːn/ az-ər-by-jahn; Azerbaijani: Azərbaycan), officially the Republic of Azerbaijan (Azerbaijani: Azərbaycan Respublikası) is the largest country in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe,[5] it is bounded by the Caspian Sea to the east, Russia to the north, Georgia to the northwest, Armenia to the west, and Iran to the south. The exclave of Nakhchivan is bounded by Armenia to the north and east, Iran to the south and west, while having a short borderline with Turkey to the northwest.