The term "Rus" refers to a group of people and a historical region in Eastern Europe, particularly associated with the early medieval state known as Kievan Rus. This state emerged in the 9th century and is considered a precursor to modern-day Russia, Ukraine, and Belarus. The Rus were primarily composed of East Slavic tribes and were influenced by Viking traders and settlers, known as the Varangians. The name "Rus" is believed to derive from a word meaning "rowers" or "seafarers," reflecting the maritime activities of the Vikings. Over time, the Kievan Rus developed a rich culture, including the adoption of Christianity in 988, which played a significant role in shaping the region's history and identity.