The Emancipation Proclamation was an executive order issued by President Abraham Lincoln on January 1, 1863, that declared the freedom of all enslaved people in Confederate-held territory. This pivotal moment in American history not only shifted the focus of the Civil War towards the issue of slavery but also redefined the war as a struggle for human freedom, influencing major battles and events, the actions of key figures, and ultimately transforming the social landscape of the nation.