CTD

[stormer]

I played a few turns as Rome today and when I continued campaign it said Summer 257BC and then it CTDed. any help would be appreciated.

[Ejergard]

This is most probably due to the garrison script. If you are inconsistant about using it, it can send you on a timejourney, breaking the game. Either if you have a save earlier that works, use that. Otherwise you need to restart!
Either always play with it on or off. "Forgetting" it can corrupt your game!