A. Put the events below in the correct chronological order.
1. The U.S declares war on Mexico.

2. The Gadsden Purchase establishes current boundaries of lower 48 states

3. Gold is discovered at Sutter's Mill.

4. A U.S. blockade of the Rio Grande angers Mexico.

5. California becomes a state.

6. The Treaty of Guadalupe Hidalgo ends the War with Mexico.