The Emancipation Proclamation is an executive order issued by U.S. President Abraham Lincoln in two parts: a preliminary proclamation on 22 September 1862, and the final proclamation on 1 January 1863. It declared that all persons held as slaves in Confederate states then in rebellion against the United States “are, and thenceforward shall be free.” The proclamation did not apply to border states remaining in the Union, nor to Confederate-held territories already under Union control at the time of issuance. It is among the most debated documents in American constitutional and legal history, touching on questions of executive authority, war powers, the causes and conduct of the Civil War, and the legal status of emancipation as a war measure versus a moral or legislative act.

The proclamation emerged from the context of the American Civil War, which had begun in April 1861 following the secession of eleven southern states. Lincoln had publicly maintained for much of the war that its purpose was restoration of the Union, not the abolition of slavery, though abolitionists and radical Republicans pressed for emancipation as both a moral and strategic goal. The preliminary proclamation followed the Union victory at the Battle of Antietam on 17 September 1862, which Lincoln had awaited as a suitable military moment to issue the order without its appearing an act of desperation. For a fuller account of events leading to and following the proclamation, see Emancipation Proclamation - History.

The final proclamation was issued under Lincoln's authority as commander-in-chief of the armed forces, framed as a military necessity measure rather than a legislative act. Because it rested on war powers rather than statute or constitutional amendment, its permanent legal standing was considered uncertain even by Lincoln himself. The Thirteenth Amendment, ratified on 6 December 1865, formally abolished slavery throughout the United States by constitutional authority. Historians and legal scholars continue to examine the precise legal effect of the proclamation on the status of enslaved persons in the states named, the extent to which it was enforceable in Confederate-held territory, and whether it constituted a genuine legal emancipation or a declaration of intent contingent on Union military success. These questions are addressed in Emancipation Proclamation - Legal Status Debate. To see the full text of the proclamation, see Emancipation Proclamation - Full Text

The proclamation also authorized the enlistment of freed black men into the Union Army and Navy. Approximately 180,000 black soldiers served in the United States Colored Troops by the end of the war.

Scholarly and popular interpretation of Lincoln's motivations has been a persistent area of debate. Some accounts emphasize the proclamation as a genuine moral commitment to ending slavery; others stress its strategic character as a war measure intended to weaken the Confederacy, discourage European recognition of the Confederate government, and energize the Union war effort. A third line of interpretation foregrounds the agency of enslaved people themselves - particularly those who escaped to Union lines - as a force that shaped and accelerated the political pressure toward emancipation. These interpretations are not mutually exclusive, and historians have advanced combinations of them. See Emancipation Proclamation - Causes Debate.

There is broad scholarly consensus among historians that the Emancipation Proclamation marked a decisive shift in the stated aims of the Civil War and substantially altered the conflict's character, even where scholars disagree on Lincoln's personal motivations or the document's immediate legal force. Consensus on specific historical and legal questions is addressed in Emancipation Proclamation - Historical Consensus.

The proclamation as moral act - Some historians and commentators interpret the proclamation primarily as an expression of Lincoln's genuine antislavery convictions, representing a moral turning point in American history. See Emancipation Proclamation - Moral Turning Point Viewpoint-viewpoint.

The proclamation as war measure - Others argue that Lincoln's primary motivation was strategic: depriving the Confederacy of its labor force, forestalling British or French intervention on behalf of the South, and framing the war in terms that would complicate Confederate diplomacy abroad. See Emancipation Proclamation - War Measure Viewpoint-viewpoint.

Emancipation from below - A distinct historiographical tradition, associated particularly with scholars such as W.E.B. Du Bois and later Barbara Fields and Stephanie McCurry, holds that enslaved people's own acts of resistance and escape - what Du Bois termed a “general strike” - were the driving political force that made emancipation necessary and possible. See Emancipation Proclamation - Emancipation From Below Viewpoint-viewpoint.

Constitutional and executive authority - A separate body of debate concerns whether Lincoln had the constitutional authority to issue the proclamation at all, and whether it set a precedent for expansive presidential war powers. See Emancipation Proclamation - Executive Authority Viewpoint-viewpoint.

Legacy and adequacy - Critics from multiple directions have assessed the proclamation's limitations: that it excluded border states, that it was contingent on military success, that it did not guarantee citizenship or civil rights, and that it was superseded almost immediately by events. Others argue these limitations were deliberate and politically necessary. See Emancipation Proclamation - Legacy and Limits Viewpoint-viewpoint.

• Emancipation Proclamation - History
• Emancipation Proclamation - Legal Status Debate
• Emancipation Proclamation - Causes Debate
• Emancipation Proclamation - Historical Consensus
• American Civil War
• Thirteenth Amendment
• Abraham Lincoln
• United States Colored Troops
• Reconstruction

1. Lincoln, Abraham. “Preliminary Emancipation Proclamation.” 22 September 1862. National Archives, Record Group 11.
2. Lincoln, Abraham. “Emancipation Proclamation.” 1 January 1863. National Archives, Record Group 11.
3. McPherson, James M. Battle Cry of Freedom: The Civil War Era. Oxford University Press, 1988. pp. 557-558.
4. Guelzo, Allen C. Lincoln's Emancipation Proclamation: The End of Slavery in America. Simon & Schuster, 2004.
5. Du Bois, W.E.B. Black Reconstruction in America. Harcourt, Brace and Company, 1935. Ch. 4 (“The General Strike”).
6. Foner, Eric. The Fiery Trial: Abraham Lincoln and American Slavery. W.W. Norton, 2010.
7. Oakes, James. Freedom National: The Destruction of Slavery in the United States, 1861-1865. W.W. Norton, 2013.
8. U.S. Constitution, Amendment XIII, ratified 6 December 1865.