What legal action during the civil war ended slavery in states that left the union?

Answer 1

The legal action that ended slavery in states that had left the Union during the Civil War was the Emancipation Proclamation. Issued by President Abraham Lincoln on January 1, 1863, the proclamation declared that all enslaved people in the Confederate states were to be set free. While it did not immediately free all enslaved individuals, it was a significant step towards the abolition of slavery and changed the character of the Civil War by making the fight against slavery a central goal of the Union war effort. The Emancipation Proclamation also allowed for the enlistment of Black soldiers into the Union Army, further contributing to the war effort against the Confederacy.