The Roman Republic is going through a very turbulent time. The struggle between the Roman senate and the consuls who seek to usurp more power keeps the state at a constant risk of civil war and it is now when one of the most famous figures of Roman history enters the stage, Julius Caesar.The new DLC gives you an opportunity to assume the leadership of several Roman legions and rise to military and political prominence by subjugating Gaul and entering the mysterious British Isles. And if you are brave enough, you can try to defy the Romans, crush their attempts to enslave Gaul and stop their expansive ambitions by drowning their greed in a bloody defeat.Two interlinked campaign maps with a number of new mechanics invite you to test your tactical genius in a fight for life. Both maps can easily take several evenings to complete and thanks to their scale they are ideal for multiplayer games.

Caesar as a special unit has been added to the game. The unit retains all the traits of a regular General but the effect of his presence on the battlefield and his ability to encourage his soldiers is much larger. If an enemy kills Caesar, this event has the power to shake the entire Roman world, yet the game can still continue.

One turn represents a week of the military campaign and the weather and seasons are introduced as new factors affecting the key tactical decisions. Outside temperatures and rainfall start to play an important role in planning military operations. High temperatures and rain make unit movement more difficult and slow, whereas low temperatures can cause damage. Winter brings snow which lowers the army mobility and creates a significant obstacle for continuous supply.

Considering the time scale, some existing mechanics are affected:

• Increase of citizens in cities per turn is much slower, thus making every military unit precious. Its destruction hurts more as it is not easy to replace it with a new one.
• Road building remains a time consuming and lengthy process, making the extension of supply lines rather slow.

Recruiting new legions is not a matter of one simple click. Caesar has a limited number of legions and the right to raise a new one has to be earned. Basic military units can be recruited in cities and specialized facilities as before, but advanced and superior units can be only gained by completing challenging tasks or through successful political plots in Rome.

Playing as Caesar allows you to continue the successful campaign in Gaul by crossing to the British Isles. Completing a set of victory conditions will take you to a new map where the initial setup reflects the state of things as you left them in Gaul.

The technology tree is replaced with "political decisions" that allow you to influence the events and actual political situation in Rome (note the Roman Republic is not a playable faction) which in turn affects the events in Gaul and Britain.