At the outset of the Civil War, to the dismay of the more radical abolitionists in the North, President Abraham Lincoln did not make abolition of slavery a goal of the Union war effort. To do so, he feared, would drive the border slave states still loyal to the Union into the Confederacy and anger more conservative northerners. By the summer of 1862, however, enslaved people, themselves had pushed the issue, heading by the thousands to the Union lines as Lincoln’s troops marched through the South.
Their actions debunked one of the strongest myths underlying Southern devotion to the “peculiar institution”—that many enslaved people were truly content in bondage—and convinced Lincoln that emancipation had become a political and military necessity. In response to Lincoln’s Emancipation Proclamation, which freed more than 3 million enslaved people in the Confederate states by January 1, 1863, Black people enlisted in the Union Army in large numbers, reaching some 180,000 by war’s end.