Why did southern states secede after Lincoln's election?
Southern leaders feared Lincoln would block slavery's expansion; his 1860 victory without any southern electoral support convinced many states that their political power and way of life were threatened.
How did the Battle of Antietam change the course of the war?
Although tactically indecisive, Antietam halted Lee’s invasion, gave the Union a political opening to issue the Emancipation Proclamation, and discouraged Britain and France from recognizing the Confederacy.
What was the purpose and impact of the Emancipation Proclamation?
Issued after Antietam, it declared freedom for slaves in rebel states, reframed the war as a fight against slavery, and allowed nearly 200,000 Black men to join the Union army.
Why was Grant promoted to lead all Union armies?
Grant’s willingness to sustain offensive pressure and accept high casualties to exhaust Confederate forces contrasted with previous cautious Union commanders, convincing Lincoln he could win the war.
What were the terms at Appomattox and why were they significant?
Grant offered lenient terms—soldiers could keep horses, officers their sidearms, and men were paroled to return home—aimed at reconciliation and a peaceful postwar transition.