Not sure how they did it, but the Yor have over 6000 population on this planet. I sent 5 transports of 3 legions and one transport of 8. I used info warfare and core detonation once, but I could never kill their defenders! It even said I nullified their defense! At first it said they had over 10,000 population, then after a few transports 58.6, then up to this number. I have no idea whats going on, but I guess I gotta give up on this game and start a new one! Yor high pop planet (bug) 
