The Great Journey:

The journey of the Elves from the eastern regions of Middle-Earth to Aman. This journey lasted many years and was led by the Vala Oromë. The hosts of the Elves were in three sections, the Vanyar, who came first, the Noldor, who were the second, and the Teleri, who were the greatest numbers, and many left the journey and remained in Middle-Earth, especially among the Teleri.