Harald I of Norway, also known as Harald Fairhair, was the first King of Norway, reigning from around 872 to 930 AD. He is credited with unifying various small kingdoms into a single realm, which laid the foundation for the modern nation of Norway. His efforts in consolidating power were marked by military conquests and strategic alliances. Harald was born into a royal family and became king after a series of battles against rival chieftains. His reign is often associated with the Viking Age, a period characterized by exploration and expansion. Harald's legacy continues to influence Norwegian history and culture today.