BATTLE OF ANTIETAM
Although the battle of Antietam was a very quickly fought battle lasting only about 8 hours. it was the deadliest single day of fighting in the entire war, there was 21,000 american deaths in that small amount of time. This was a key battle for the Union. An officer of the confederacy, much to the dismay of General Lee and Jackson, had lost the thoroughly thought through plans which were found by the Union and used against the Confederacy to win the battle. Abraham lincoln (president of the Union) used this battle to write the emancipation proclamation.