1. Ten Most Important Documents By Rebecca Angoff

2. Mayflower Compact 1620

3. Declaration of Independence 1776

4. Constitution of the United States 1787

5. Louisiana Purchase 1803

6. Monroe Doctrine 1823

7. 13 th Amendment: Abolition of Slavery 1865

8. Zimmerman Telegram 1917

9. 19 th Amendment: Right for women to vote 1920

10. Immigration Act of 1924 1924

11. Truman Doctrine 1947