Arthedain was one of the kingdoms of the Dúnedain in Middle-earth, established after the fall of Arnor. It existed during the Third Age and was known for its rich history and connection to the line of Isildur. The kingdom was located in the northern regions of Eriador. Arthedain faced constant threats from neighboring realms, particularly from Angmar, which sought to conquer it. The kingdom ultimately fell in 1974 of the Third Age, leading to the scattering of its people. Despite its demise, Arthedain's legacy continued through its surviving heirs, notably Aragorn, who would later unite the kingdoms of Gondor and Arnor.