We had a few reports of players getting "Connection to the City Failed" or "Connection Timed Out" errors - and as much as we hate to admit it - our server has hit a temporary limit - that we are working on increasing right now.
Meanwhile you still should be able to login - just try it a few times, and wait about 30 seconds after each try. The afternoon player rush should end in about 3 hours and you should be able to get online with no problems.
We have a fix for this ready, but unfortunately it would require us to restart the server, and we can`t really do it yet - as so many players would complain about 5 minutes downtime... We do plan to do this sometime during late night once there are less players online.
Please accept our apologies for the inconvenience. And thanks for all the support guys! We are glad to see thousands of you enjoying the game - and I guess this is just one of these "pleasant" issues - we just never imagined so many players enjoying DoF: Kingdom Wars.