These first Dúnedain are the Númenóreans. They became a great civilization, and began maritime pursuits for exploration, trade and power. Some returned to Middle-earth, creating fortress-cities along its western coasts, dominating the lesser men of these areas. In time the Númenóreans split into two rival factions: the Faithful, remaining loyal to Elves, and the King's Men, who were eventually seduced by Sauron.