Which conflict was fought by the United States in the 1800s?

The Civil War was a significant conflict fought by the United States in the 1800s, specifically from 1861 to 1865. This war arose primarily from tensions surrounding slavery and states' rights. It was a pivotal moment in U.S. history, resulting in the preservation of the Union and leading to the abolition of slavery with the passage of the 13th Amendment.

While the Revolutionary War, fought from 1775 to 1783, established the U.S. independence from Britain, and the War of 1812 occurred from 1812 to 1815 over various grievances against Britain, these wars took place before the Civil War. The Mexican-American War, which happened between 1846 and 1848, also predates the Civil War but is a separate conflict focused on territorial expansion. The Civil War stands out in the 1800s as a battle that fundamentally transformed the nation’s social, political, and economic landscape.