
c.1000 Sauron, alarmed by the growing power of the Númenoreans, chooses Mordor as a land to make into a stronghold. He begins the building of Barad-dûr.
c.1600 Sauron forges the One Ring in Orodruin. He completes the Barad-dûr. Celebrimbor perceives the designs of Sauron
Originally posted by Nightingale
Wasn't Minas Morgul actually a stronghold of Gondor after Sauron was defeated the first time to keep watch over Mordor. I can't remember.