Settler

The Settler unit is a civilian unit that can create new Settlements. It is produced at a City tile for a cost of 1. It has a movement speed of 1 and a vision radius of only 2. The settler has only 1 hitpoint and cannot attack.

Settle

For a cost of 4, the Settler unit can settle on a Grass, Dirt, Desert, Stone or Forest tile, replacing that tile and itself with a Settlement tile with 1 building.