Brandenburg-Prussia was a historical state in Central Europe that emerged in the late 15th century. It began as the Margraviate of Brandenburg and expanded significantly when it incorporated the Duchy of Prussia in the 17th century. This union laid the foundation for the rise of a powerful state that played a crucial role in European politics. The state became a key player in the formation of the Kingdom of Prussia and later the German Empire. Under leaders like Frederick the Great, Brandenburg-Prussia developed a strong military and centralized administration, influencing the region's culture and governance for centuries.