Second level of colonists living on an island, can be accessed after getting enough Pioneers (250). You need 1500 Vassals before you can create discovery, transport and treasure ships.
In addition to Pioneers' needs, Vassals require:
- Food: Bread (@100 vassals)
- Drink: Cider (@ 500 vassals)
- Clothing: Linen Garments (@1500 vassals)
Every 10 vassal residences will give you 5 merchant ascension rights.