Sauron created a strong alliance between the tribes of Easterlings, so that when he returned he had many Men in his service. The main events of The Hobbit occur in . By the time of The Lord of the Rings, Sauron had recovered, and was seeking the One Ring. The events of the ensuing War of the Ring leading to the end of the Third Age is the subject of The Lord of the Rings, and summarized in Of the Rings of Power and the Third Age. After the defeat of Sauron, Aragorn takes his place as King of the Reunited Kingdom of Arnor and Gondor, restoring the line of Kings from the Stewards of Gondor. Aragorn marries the daughter of Elrond, Arwen, thus for the last time adding Elvish blood to the royal line. As the age ends, Gandalf, Frodo Baggins and many of the remaining Elves of Middle-earth sail from the Grey Havens to Aman. Fourth Age With the end of the Third Age began the Dominion of Men. Elves were no longer involved in Human affairs, and most Elves left for Valinor; those that remain behind "fade" and diminish. A similar fate meets the Dwarves: although Erebor becomes an ally of the Reunited Kingdom, there are indications that Khazad-dûm is refounded together with a colony established by Gimli in the White Mountains. Together, they disappear from human history. Eldarion, son of Aragorn II Elessar and Arwen Evenstar, became King of the Reunited Kingdom in F.A. 120. Aragorn gave him the tokens of his rule, and then surrendered his life willingly, as his ancestors had done thousands of years before. Arwen left him to rule alone, passing away to the now-empty land of Lórien where she died. Upon the death of Aragorn, Legolas departed Middle-earth for Valinor, taking Gimli with him and ending the Fellowship of the Ring in Middle-earth. Tolkien once considered writing a sequel to The Lord of the Rings, called The New Shadow, which would have taken place in Eldarion's reign, and in which Eldarion deals with his people turning to evil practices – in effect, a repetition of the history of Númenor. In a 1972 letter concerning this draft, Tolkien mentioned that Eldarion's reign would have lasted for about 100 years after the death of Aragorn. His realm was to be "great and long-enduring", but the lifespan of the royal house was not to