Industrial Ages (Civ3)

The Industrial Ages are preceded by the Middle Ages and followed by Modern Times in Civilization III.

In order to advance to the next era, all technologies must be discovered, except for those marked with the "No" symbol, specifically Nationalism, Communism, Espionage, Fascism, Amphibious War, Advanced Flight, and Sanitation.

Civilization III Eras

Ancient TimesMiddle AgesIndustrial AgesModern Times