The Emancipation Proclamation and the Reconstruction Amendments

Lincoln signed the Emancipation Proclamation on January 1, 1863, using his power as commander in chief during wartime. That power only let him act against the enemy, the Confederacy. So the Proclamation declared enslaved people free only in Confederate territory still in rebellion. It did not touch slavery in the loyal border states, Missouri, Kentucky, Maryland, and Delaware, because those states were not at war with the Union. It also could not reach Confederate areas already back under Union military control, since those were no longer officially in rebellion. The result: a document that on paper freed about 3.5 million people, but had zero enforcement power where Confederate soldiers still held ground, and no legal authority at all over slavery in states that had never left the Union.

A military order can only do what war powers allow, and it only lasts as long as the emergency and the political will behind it last. It cannot rewrite the Constitution or bind future presidents and courts. That is why actual abolition required a constitutional amendment. The Thirteenth Amendment, ratified in 1865, abolished slavery everywhere in the United States, closing the gap the Proclamation left open in the border states and beyond. The Fourteenth Amendment, ratified in 1868, guaranteed citizenship and equal protection of the laws to everyone born in the country, overturning Dred Scott v. Sandford. The Fifteenth Amendment, ratified in 1870, barred denying the vote based on race. Together these three amendments form the constitutional floor civil rights litigation stands on for the next century, the text later cases like Brown v. Board and Loving v. Virginia reach back to.