Victories in major conflicts, particularly during the American Civil War, helped establish a stronger national identity.

After the Union's win in the Civil War, the United States became more unified, resolving key issues like slavery and secession. This victory reinforced the idea of a single, indivisible nation and strengthened the role of the federal government in preserving the Union. While the South faced significant challenges during Reconstruction, the war ultimately brought a renewed sense of unity and commitment to national values. It helped shape a collective American identity, emphasizing liberty, unity, and the protection of citizen's rights under one nation.