Why did some states want to the union during the Gettysburg Address?

During the Gettysburg Address, some states sought to preserve the Union to uphold the principles of democracy and equality, as articulated in the Declaration of Independence. The Civil War was fought over issues such as slavery and states' rights, and the address emphasized the importance of national unity and the sacrifices made by soldiers. The desire to maintain a unified nation was rooted in the belief that a government "of the people, by the people, for the people" must not perish, highlighting the urgent need to resolve the conflict and ensure a stable future.