From what I remeber, Hammerfell was in a civil war. Tiber didn't play them against each other, after A'tors father died the Forbears and Crowns really split and went about killing each other, only with A'tor and the Crowns slaughtering the Forbears. Only after that, did the empire get involved, when the Forbears agreed that in return for aid, they would come into the empire.
A'tor, was beaten back by the legions with apparent ease. The best Imperial troops we're not quite slaughtered I don't think, given A'tor constantly lost ground before being forced to retreat to Stros Mak'i. The Empire met their match on the sea, not on land it would appear, and that where the bloodshead really came, ending with the empire having to call their pet dragon in. There was alot of bloodshead, but most of it was Ra'Gada blood. Hammerfell wasn't taken by Armistace, it was conquered.
Now, after good o'l Cyrus stirred up some trouble, did Hammerfell rise up and kick the legions ass, in which Tiber was forced to make an Armistice favoring them. Hammerfell wasn't taken by an armistice in any occasion.
I'll let you see where you contradicted yourself.
As for more bloodshead, Tiber invaded Morrowind, in which many, many bloody and devistating battles took place, or am I thinking of Remen?
You're thinking Remen. Vivec compromised and gave Tiber the Numidium in exchange for autonomy
High Rock was conquered too, so I would add Hammerfell and High Rock as the two areas 'fully' conquered, but either way, there was tons of bloodshead.
But as Shades said, Tiber is Breton, and much of the Breton armies were beat at Sancre Tor.
I don't think we get the whole story after Numidium. No matter what, i don't think Numidum was all that was used to conquer the Aldmeri Dominion, it doesn't seem likly at all. There had to have been some actual fighting in between, it just doesn't seem logical they would give up at the sight of sir' stomps alot.
No, the Numidium screws up time and makes it that the Dominion was just part of the Empire, just as in the Warp of the West made each kingdom just win. The Numidium isn't as much of a weapon as a reality changer.
Edit: I really don't know why that last quote box is so screwed up.