The combat system is broken, a much weaker attacker can destroy 4 defenders without losses. I've yet to see a more unrealistic and disappointing combat system in ANY game. I'm sorry I have to quit after I spent money on this... A few predators, who pay to win, rule the server. Corp system, joint defense and defense units are useless, until combat is fixed. Alas, there is zero chance for fix, as devs made it this way on purpose. Enjoy...