It is not otherwise mentioned until the Second Age, when the Sindarin lords Oropher and Amdír established two Silvan Elf kingdoms in Northern Greenwood and in Lórinand (Lórien).
According to notes made by Tolkien after the publication of Lord of the Rings and found in Unfinished Tales, Oropher, the Sindarin king of the Silvan Elves of Mirkwood, or Greenwood the Great as it was then known, raised a large force as part of the Last Alliance to overthrow Sauron.