Identify part: Christianity in both Byzantium and Kievan Rus
Explanation: The prince of Kievan Rus at the time was looking for a way to unify his people and the Greek Orthodox religion of Byzantium presented a great opportunity to instill a common identity. The religion increased relations between the Byzantine Empire and Kievan Rus, which gave Rus a strategic advantage because it increased trade due to a river that connected the two lands. The political application is the way the governments used religion to unite and rule over their people to their advantage.
Boundaries are created through natural geography, geometry, and conflict. Geographic boundaries include mountain ranges and rivers. For example, the Pyrenees Mountain Range forms a natural border between France and Spain.
