From the publisher's web site: Pulse of Battle covers ancient massed combat, roughly the “Classical” ancient period from 1500 BC to 500 AD. Pulse of Battle uses basic Field of Battle 2nd Edition mechanics, with the capabilities of ancient armies blended into the rule system. Card Sequence Decks randomize the turn sequence, and allow scenario designers to add special twists to the sequence by inserting unique cards. The fog of war is accounted for by the same Sequence Decks, as players find themselves managing the chaos of battle instead of plotting their next chess or checkers style moves. Games of 20 unit melee-intensive armies can be completed in around 1 1/2 hours; smaller and larger games vary accordingly. Historical Period Notes are compact military histories that are included for each of 14 periods: Chariots In the Days of Megiddo and Qadesh Assyrian Wars Spears and Pikes Greek and Persian Wars Wars of the Greek City States Alexander’s Wars Wars of the Diadochi Early Rome 2nd Punic War Rome’s Rise in the east The Wars of Julius Caesar Imperial Rome Conquest and Empire Imperial Crises and Decline The Late Romans China Han Chinese China Divided