Players can contribute resource cards to the war pile to influence battles between the Greeks and Trojans. Greeks benefit from Wood and Wheat, Trojans from Ore and Sheep. Whichever side has the most resource cards of the appropriate types wins the battle. Each battle won is worth one victory point for the players who support that side. The Great Wall' is set in ancient China with players taking the role of Chinese rulers responsible for maintaining the Great Wall so that the invading Mongol horde does not ravage the land.
Players are each responsible for one section of the wall.
They build watchtowers on this section to keep out a growing number of Mongol raiders. Both scenarios are enjoyable. Obviously SoC is too simple a system to accurately simulate large-scale battles, but as a different flavor for the basic SoC game, the scenarios work quite well. I enjoy The Great Wall scenario more than Troy. Having to balance spending your resources on a stronger wall instead of expansion is a nice dynamic.