Which amendment to the US Constitution that was ratified in 1865 abolished slavery and involuntary servitude?

The Thirteenth Amendment is the amendment to the U.S. Constitution that was ratified in 1865 and abolished slavery and involuntary servitude. It is one of the most important constitutional changes in American history because it permanently ended legal slavery in the United States after the Civil War. The amendment’s central language states that neither slavery nor involuntary servitude shall exist in the United States, except as punishment for a crime after a lawful conviction.

The Thirteenth Amendment was ratified on December 6, 1865, months after the Civil War ended and after President Abraham Lincoln had been assassinated. Its passage marked a turning point because it changed the Constitution itself. Before that, slavery had been protected or accommodated in several ways by American law and politics, even though the word “slavery” was often avoided in the original Constitution. The Thirteenth Amendment made abolition national, permanent, and legally binding.

The amendment followed years of conflict over slavery’s expansion and survival. The United States had been divided for decades over whether slavery would be allowed in new territories and states. Compromises such as the Missouri Compromise and the Compromise of 1850 tried to manage the issue, but they did not solve it. By the time Abraham Lincoln was elected in 1860, Southern states feared slavery’s future was threatened. Secession and the Civil War followed.

Lincoln’s Emancipation Proclamation, issued during the war and taking effect on January 1, 1863, was an important step, but it did not abolish slavery everywhere in the United States. It declared freedom for enslaved people in areas still in rebellion against the Union. It did not apply to slaveholding border states that remained loyal to the Union, and it depended on Union military success to be enforced. The Thirteenth Amendment went further because it applied across the country.

Getting the amendment through Congress was difficult. The Senate passed it in April 1864, but the House of Representatives did not initially approve it. Lincoln strongly supported the amendment and made it a major goal after his reelection in 1864. The House finally passed it on January 31, 1865. That moment was later remembered as one of the most dramatic legislative victories of the Civil War era. From there, the amendment went to the states for ratification.

The exact wording of the amendment has two sections. The first section abolishes slavery and involuntary servitude, with the crime-punishment exception. The second section gives Congress the power to enforce the amendment through appropriate legislation. That enforcement power mattered because ending slavery on paper did not automatically create equal rights or fair treatment. Former Confederate states soon passed Black Codes that tried to control the lives and labor of formerly enslaved people. Congress later used its enforcement authority to pass civil rights laws, although many of those protections were weakened by court decisions and resistance.

The Thirteenth Amendment is often grouped with the Fourteenth Amendment and Fifteenth Amendment as the Reconstruction Amendments. Together, they reshaped the Constitution after the Civil War. The Thirteenth abolished slavery. The Fourteenth addressed citizenship, due process, and equal protection. The Fifteenth prohibited denying the right to vote based on race, color, or previous condition of servitude. Each one responded to the central question of what freedom and citizenship would mean after slavery.

The amendment’s crime-punishment exception has remained an important and debated part of its legacy. After the Civil War, some Southern states used laws, arrests, convict leasing, and forced prison labor systems in ways that trapped many Black Americans in harsh labor conditions. This history is one reason the Thirteenth Amendment continues to be discussed in connection with prison labor, criminal justice, and civil rights.

The correct answer is the Thirteenth Amendment. It did more than end a wartime practice. It changed the Constitution, abolished legal slavery nationwide, and became the foundation for later efforts to define freedom, citizenship, and civil rights in the United States.