1. 1781: The Articles of Confederation were ratified as Maryland became the thirteenth and final U.S. state to sign.

2. 1803: Ohio was admitted as the seventeenth U.S. state.  (No, Azrael wasn’t alive then)

3. 1845: U.S. President John Tyler signed a resolution to annex the Republic of Texas.

4. 1864: Rebecca Lee became the first African-American woman in the United States to receive a medical degree.

5. 1936: Construction of the Hoover Dam was completed.

6. 1961: U.S. President John F. Kennedy established the Peace Corps.

7. 1971: A bomb was detonated in the U.S. Capitol building by the Weather Underground Organization, a radical left-wing group.

8. 2002: Operation Anaconda, the largest U.S.-led ground offensive since the Gulf War, began in eastern Afghanistan.

9. 2002: The Netherlands became the first country in the world to legalize same-sex marriage.

10. 2014: Russia officially annexed Crimea after a controversial referendum.