Which document issued by Abraham Lincoln aimed to free slaves?

The Emancipation Proclamation is the correct answer because it was a significant executive order issued by President Abraham Lincoln on January 1, 1863. This document declared that all slaves in the Confederate states were to be set free. It marked a pivotal moment in the American Civil War, as it not only aimed to undermine the Confederate economy but also shifted the focus of the war towards ending slavery. The proclamation demonstrated Lincoln's commitment to the abolition of slavery and encouraged many enslaved individuals to escape or join the Union army, further bolstering the Union's position in the war.

In contrast, The Declaration of Independence established the United States' separation from British rule and articulated principles of individual liberty and the right to pursue happiness, but it did not address slavery directly. The Constitution provided the framework for the United States government and included compromises that allowed slavery to continue. The Bill of Rights enumerated individual freedoms and rights but did not specifically relate to the institution of slavery or its abolition.