Mass Production
Mass Production is an Industrial Age Factory technology that reduces training time by 25% for Heavy Cannon, Rocket, Great Bombard and Papal Bombard. The effect applies only to the named artillery units.

Research profile
- Age & building
- Industrial Age · Factory
- Effect
- −25% training time
- Affected units
- Heavy Cannon · Rocket · Great Bombard · Papal Bombard
Research effect
Research takes 30 seconds and costs 300 Food and 300 Coin. The Factory must be able to train an affected unit under the active civilization and expansion rules. The upgrade changes production time; it does not reduce unit cost or accelerate other artillery.
Research condition
Industrial Age · Factory · 300 Food · 300 Coin · 30 seconds · −25% training time for Heavy Cannon, Rocket, Great Bombard and Papal Bombard.
Cost and prerequisites
Research when the Factory is expected to produce the listed artillery repeatedly, such as to maintain siege pressure or replace losses. Queue the upgrade before production becomes urgent, and protect the Factory and its high-value guns. Confirm the relevant artillery is available to the civilization before investing.