+ 2 max iron workers
Research data
- Research branch
- Iron mine
- Unlock requirement
- Iron mine level 2 · Carpenter level 2
- Cost rank
- 13
- Wood cost
- 3,000
- Stone cost
- 3,000
- Food cost
- 3,000
- Gold cost
- 1,500
- Iron cost
- 4,500
- Effect
- + 2 max iron workers
Improved Work Area II
+ 2 max iron workers