Kingsburg
How is the enemy deck put together at setup?
The setup section of the rulebook describes this procedure exactly.
- Kingsburg rulebook · Rulebook · Setup
Sort the enemy cards into five stacks by the numeral on their backs (I to V), draw one card at random from each stack without looking, and stack the five face down in numerical order with I on top. The remaining 20 cards go back in the box unseen and are not used that game.