What was the U.S. war between the North and the South called?

The U.S. war between the North and the South is known as the Civil War. This conflict, which took place from 1861 to 1865, primarily arose from tensions surrounding issues such as slavery, states' rights, and economic differences between the industrialized North and the agrarian South. The term "Civil War" refers specifically to a war between factions within the same country, highlighting the domestic nature of this conflict rather than an international struggle, which distinguishes it from other wars like the Revolutionary War, World War, or Spanish-American War. Each of those conflicts involved different issues and contexts, making "Civil War" the precise term for the conflict that pitted the Union (the North) against the Confederacy (the South). This war ultimately led to significant developments in American society, particularly concerning the abolition of slavery and the redefinition of state and federal powers.