IGN Multiplayer Q&A

[pevergreen]

In addition, players will get the option to fight as the opposing AI army in any battle encountered by their opponent. So basically, the player can replace the AI in battle, meaning that players can be constantly fighting multiplayer battles that have an impact on the overall campaign. Want to buckle your opponent before they even reach your borders? This might just be the way to do it.

And suddenly taking over lightly defended cities became much, much harder.

Rebellions in some regions can result in the emergence of nations -- for example, Scotland or Greece.

Best. Game. Ever.