[Cyrus]

If his fleet was legendary I think it's at, at least, 30 Experience. Then you have to figure most of the ships in the fleet would probably be around 20 or so experience (the max you can train at a training facility). So, due to experience, his ships would gain a +50% to hit and a +50% to defense. This is a huge advantage, if he can keep your ships at max range you have something like a 1% chance to hit him while he would have something like a 50% or 60% chance to hit. I would imagine that this is why your 100 ships bit the dust. Also, keep in mind that Battle Cruisers probably have 20-25% more firepower than a Cruiser, so instead of him facing 3 - 1 odds it was more like 2 - 1 odds.