Ab Urbe Condita is an overhaul for Rome: Total War, featuring an array of additional content, including new units, an AOR mercenary system, an expanded campaign map and graphical improvements (among many other amendments).
Full mod (v2) Changes: - A severely LONG list of changes have been made: * It now runs on Alexander.exe; this was necessary in order to incorporate the new additions. Furthermore, the AI performs much better now (including naval invasions). * A small AOR system has been included: nothing fancy, just a few mercenary units that are now recruitable in various regions dotted throughout the map. * A new fully fleshed out faction: The Arabian Kingdom of Sabaea * Many new units (about 50-60 in all I think) * The popular "Force Diplomacy" script has been added; now in diplomatic discussions, press the ? mark at the top of the screen to force the enemy faction to accept your terms (try not to abuse it; it is intended to counter the daft AI) * Many new re-skins of pre-existing units. * New AI Advisors * New Battlemaps * And many more wee additions!