The drowning of Numenor

[Landroval]

Umbar was always opposed to Gondor, but not always in league with Mordor.

I twice disagree:

Originally Posted by Of herbes and stewed rabbit, TTT

'Tis said that there were dealings of old between Gondor and the kingdoms of the Harad in the Far South; though there was never friendship. In those days our bounds were away south beyond the mouths of Anduin, and Umbar, the nearest of their realms, acknowledged our sway. But that is long since. 'Tis many lives of Men since any passed to or fro between us. Now of late we have learned that the Enemy has been among them, and they are gone over to Him, or back to Him-they were ever ready to His will-as have so many also in the East

not to mention that Earnil I once made Umbar a fortress of the Numenoreans; moreover:

Originally Posted by Gondor and the heirs of Anarion, RotK

The great cape and landlocked firth of Umbar had been Numenorean land since days of old; but it was a stronghold of the King's Men, who were afterwards called the Black Numenoreans, corrupted by Sauron, and who hated above all the followers of Elendil