A bunch of gameplay videos appeared on YouTube. Apparently, CA had a bunch of people fly to San Fransisco to play the first 30 turns of the game. The videos show quite a lot of details about campaign map and the battles. Watching them will likely answer a lot of your questions.
Many A True Nerd:
Invicta:
Angry Tom:
Turin:
GameSpot:
PartyElite:
milkandcookiesTW:
HeirofCarthage:
lionheartx10: