Final answer:
The Civil War Amendments demonstrated the supremacy of the national government by superseding state laws and securing equal rights for African Americans.
Step-by-step explanation:
The Civil War Amendments, which include the Thirteenth, Fourteenth, and Fifteenth Amendments to the U.S. Constitution, demonstrated the supremacy of the national government by superseding state laws. These amendments were introduced following the Civil War and aimed to secure equal rights and protections for African Americans who had been enslaved and oppressed.
The Thirteenth Amendment abolished slavery, thereby invalidating any state laws that allowed it. The Fourteenth Amendment guaranteed equal protection under the law for all citizens, overriding any discriminatory state legislation. Additionally, the Fifteenth Amendment granted African American men the right to vote, superseding any state laws that denied this right based on race.
By enshrining these rights and protections in the U.S. Constitution, the Civil War Amendments firmly established the national government's authority and supremacy over state governments in matters related to civil rights and equal protection.
Learn more about Civil War Amendments