As with many other groups, the origins of the Rus are tied to the dominance of the Vikings over Western Europe in the early part of the Dark Ages or Medieval Era. Their Scandinavian brethren also traveled eastwards, behaving in similar ways but ultimately settling and assimilating in the region in an idiosyncratic manner. The Rus focused on several trade routes. The most important of these was the "eastern" route towards the Caspian Sea and stretching as far as Baghdad in the Middle East. This then gave way to the "western" route leading through Kiev to the Black Sea and Byzantine capital city Constantinople. The Rus also developed other trade routes, including to Western Europe.
Eventually, the Rus began to establish permanent settlements, firstly in Novgorod and then south to Kiev. This will be accompanied by the exploration of growing Rus dominance of this region, particularly through historical figures in the Rurikid dynasty such as Rurik, Oleg, Igor, Olga, Svyatoslav, Vladimir, and Yaroslav. During this time, the Kievan Rus empire was established and rose steadily to become a major regional power, even challenging the dominant Byzantines.