While I would love to prove our empire has been GLORIOUSLY conquering the stars since before you lot even got off the ground, it seems that's impossible at the moment. Considering these elves as you call them have scarcely left their homeworld at present, I find your claims that they were the greatest spacefarers suspect. At least the Anzlati have something to show for their claims of greatness.
We could always figure out who's right by comparing ships and piloting ability, but I'll have you know honor duels are a common training exercise around here.