I'm fairly new to the game, but have thus far been quite successful in my first few games on 'tough' difficulty. A key to my success has been ignoring military completely until my economy/research are thriving. However, I get the feeling that I've been getting lucky and/or inadvertantly stumbling into an AI weakness. In both of my last games the Drenging parked a fleet of ships (including transports) next to my key planets while I still had *zero* military, yet did not attack. After about ~10 turns I was able to crank out some ships and secure my planets. If they had attacked during this time, I would have been annihilated. Has anyway else encountered this behavior?