Mighty Army

Mighty Army is a time-limited special event where you can easily unlock a load of resources, tomes and other things by training units and defeating barbarians.

Your score in this event is reset daily at 0:00 UTC, so some of the achievements will be difficult to achieve - such as train 10,000 troops!

The rewards are good and it's always good to train troops and defeat barbarians anyway, so this is a good one to go for I think.