What type of forces did Sauron had in the second age?

[Kuruharan]

Originally Posted by Victariongreyjoy

I've always wondered how Sauron during the S.A managed to destroy the Noldor kingdom by mortal forces. I mean we know how strong the elves were, even more so by high elves. Did Sauron himself contributed his magic to help his forces destroy the elven kingdom or was his forces so massive the elves didn't stand a chance? Or did he had any supernatural forces?

I don't think Eregion ever had much in the way of population, so I don't think it would be too hard for Sauron to militarily overwhelm it.

Originally Posted by Victariongreyjoy

If the ringwraiths or similar beings were made by Sauron to lead his armies, would he have any upper hands against Ar-Pharazon and the numenorean army? Or are the numenoreans not so easily scared like their kins in later generations of Gondor?

Had there been enough time for the Ringwraiths to assume their final form?