The war fought between the northern and southern states of America from 1861 to 1865 is known as the American Civil War. It primarily centered around issues such as state sovereignty, the expansion of slavery, and economic differences between the industrial North and the agrarian South. The conflict resulted in significant social, political, and economic changes in the United States. It concluded with the Union’s victory, the abolition of slavery through the 13th Amendment, and a long and complicated Reconstruction era that sought to integrate formerly enslaved people into American society while addressing the needs of the Southern states.