Answer:
The answer is below
Step-by-step explanation:
1. Henry Clay was elected to the Senate in 1806 (first time as a senator).
2. War broke out between the U.S. And Mexico. - known as Mexico -, American War, it started in 1846
3. California became a state in the Union. - this occurred in September 1850, when California joined the Union as a non slavery state.
4. The Civil War broke out. - United States of America civil war started in 1861