What did almost every state in the Civil War do?

During the Civil War, almost every state in the United States either joined the Union or the Confederacy, reflecting a deep national divide over issues like slavery and states' rights. States in the Confederacy seceded from the Union, while Union states fought to preserve the nation. Additionally, many states contributed troops, resources, and support to their respective sides in the conflict. The war ultimately led to significant social, economic, and political changes across the country.