Norwegian history begins with the early settlers around 10,000 BC, who were primarily hunter-gatherers. By the Viking Age (circa 800-1050 AD), Norwegians became known for their seafaring skills, exploring and trading across Europe. The unification of Norway began in the 9th century under King Harald Fairhair, leading to the establishment of a centralized monarchy. In the late Middle Ages, Norway entered a union with Denmark in 1380, which lasted for over four centuries. The country gained independence in 1814, briefly declaring its own constitution before entering a union with Sweden. Norway finally became fully independent in 1905, shaping its modern identity.