Aztec historians report about a religious mass murder: within four days over 40.000 people were brutally sliced open to satisfy their debt to the sun god. The priests wore special masks and ripped every poor victim open to get their hearts and loads of blood. The slaughter must have been unbelievable while the citizens watched.

What a huge operation! First you have to catch 40.000 people to enslave, you need thousands of soldiers to keep them at bay and control them while they are guided to the slaughter.