That's cool to have a minor invade.  I haven't seen that one yet.  It would be nice to be able to get all minors to be as powerful and aggressive as the majors at the outset of the game.  It would be like playing against 17 majors. 

What difficult level was that on? Mine was suicidal.

I also had a minor change the entire outcome of a game for me. Their homeplanet was like a class 17 or something crazy like that and they came on fairly early on in the game. At one point when there were only 4 races left i decided to go all out and try to get a military victory. I did not have the larger empire, and i had only a modest army. It started out well as i puched deeper and deeper into altarian territory, but eventually the front stabilized. Until one day five fleets (minor race fleets) stacked to the logistical nines appear out of nowhere and the delicate balance of forces that existed was shattered ina  matter of three or four turns. My fleets were destroyed and i didnt have enough ships pumping out fast enough to replace them. The Altarians regained the upper hand and dealt me a sever correction.