The player opponent matchmaking system is based on your amount of Victory Points and in certain cases also on your Headquarter level. If you are on the lower end of VPs there is a higher… 

If you’ve lost access to your Game Center or Apple ID, please ask Apple for assistance . We cannot access Game Center account information or help players recover lost accounts or passwords.

To transfer your account to another device, choose your operating system and follow these steps: iOS > iOS (iPhone, iPad, iPod Touch) 1. Verify that your game is connected to a Game Center account. 2.… 

During updates or maintenance, the game is not accessible by any player, so attacking is impossible. Any attack will have occurred after the service break. Although there is a short cool-down in place after maintenance…