original_query: What events occurred in the United States between 1849 and 1865?
query: What major events occurred in the United States between 1849 and 1865?
answer: Major events included the economic and cultural changes of industrialization and westward expansion, heightened sectional conflict over slavery (including the Compromise of 1850, Kansas-Nebraska Act, Bleeding Kansas, Dred Scott decision, and John Brown's raid), the election of Abraham Lincoln, the secession of Southern states, and the American Civil War.