Abraham Lincoln's leadership during the Civil War was defined by several key events, including his issuance of the Emancipation Proclamation in 1863, which aimed to liberate enslaved people in Confederate states. His ability to navigate complex political dynamics and maintain support for the Union was crucial. Lincoln's strategic decisions, like the appointment of key generals and the dedication to a war policy aimed at preserving the nation, showcased his commitment to democracy. His speeches, particularly the Gettysburg Address, articulated the principles of liberty and equality, embodying his vision for a united America.