What did the union gain from the war?

The Union gained several significant outcomes from the Civil War, most notably the preservation of the United States as a single, unified nation. The war also led to the abolition of slavery through the Emancipation Proclamation and the Thirteenth Amendment, fundamentally transforming the social and economic landscape of the country. Additionally, the Union's victory reinforced the federal government's authority over the states, setting a precedent for a stronger central government.