I don't believe this is as one-sided as some below seem to think. We played it three times and saw victories of 6-5 Persian, and 6-4 and 6-4 to the Spartans. However, in both the Spartan victories, the Persians started with a Double Time with the eventual result being the wiping out of Leonidas and the Spartan right for the loss of three or four of the Persian medium infantry units. It then became a question of could sufficient Persian units exit the map before the Spartans achieved victory on their left flank. In both cases the answer was no, but this was due to a paucity of appropriate cards in the Persian hand. Despite this, however, the Persians should still have won at least one of the games if they had played better, even with the cards they did have.
In the other (Persian victory) game, the Persian player had no cards for the main body on the left, allowing the Spartans to advance and eliminate two of the archers. Eventually the Persians were able to get organised as the Spartans had no cards to follow this up (they started with four sectional cards in the centre and two Move Heavy Troops) and they were able to eliminate the entire Spartan/Greek army on both flanks.