Talk:Library

The "Big Four" Technologies are Military, Civics, Commerce, and Science. One is available in each age. Researching all four of the American Age techs makes the special "End of an Era" technology, advancing you to a special age-within-an-age, the Global Age.

MILITARY
Spanish Age: Explorer's Guard

Exploratory Age: Mercenaries

British Age: Armed Colonists

Revolutionary Age: Colonial Militias

French Age: Standing Armies

Hispania Age: Reformed Armies

Dixie Age: Corps System

American Age: Automatic Weaponry

CIVICS
Spanish Age: Explorer's Party

Exploratory Age: Outpost

British Age: Charter

Revolutionary Age: Colonialism

French Age: Republicanism

Hispania Age: Frontiersmen

Dixie Age: Expansionism

American Age: Jingoism

COMMERCE
Spanish Age: Treasure

Exploratory Age: Minerals Trade

British Age: Cash-Crop Agriculture

Revolutionary Age: Mercantilism

French Age: Industrialism

Hispania Age: Banking

Dixie Age: Stock Exchange

American Age: Fordism

SCIENCE
Spanish Age: Exploration

Exploratory Age:

British Age:

Revolutionary Age:

French Age:

Hispania Age:

Dixie Age:

American Age: