Period 7: 1890-1945 (10 gen 1890 anni – 1 gen 1945 anni)

Descrizione:

The United States starts to get pulled onto the world stage in a big way for the first time.

Main concepts:

- Progressive reforms
- Imperialism
- World War I
- The Great Depression
- World War II

Aggiunto al nastro di tempo:

Data: