🔒 Pro members only
The age of empire
At the turn of the twentieth century, the United States emerged as a world power and an empire.
This lesson is part of the members-only content of US history. The first 3 lessons of every course are free — this one starts after the free preview.
- ✓ Unlimited access to every lesson, video and article
- ✓ All subjects and age groups in one membership
- ✓ Cancel anytime · Visa & MasterCard accepted