I would like to point out one thing else...
"Realm mergers are illegal. Realms may surrender to another, including annihilation of their lands, but they may not merge as equal entities on friendly terms. "
Like I said, I do believe there is some question as to whether this is applicable in this case. I believe that the answer is, "Yes, it still qualifies as an illegal realm merger," but I do acknowledge that reasonable people could find the opposite to be the answer.
There is absolutely no question whatsoever as to whether the fact that D'Hara must conquer the last region of Terran makes this a realm merger. That is utterly preposterous, and just a few minutes' thought about the implications of it could have quite easily shown that.
