List at least two reasons why the Union victory at Antietam was so important

The Union's claim of victory at Antietam and Lincoln's Emancipation Proclamation are thought to be why Republicans held the House in the 1862 mid-term elections. They also ended any hope of France and Great Britain acknowledging the Confederacy and coming to their aid.

Explanation:

evaluate the extent to which the seven years' war (french and indian war, 1754–1763) marked a turning point in american relations with great britain, analyzing what changed and what stayed the same from the period before the war to the period after it.