To recruit more troops, conscription was adopted to fill the ranks, new weapons were developed. During the course of the war, the Union also offered incentives to encourage more recruits. New technologies were introduced and Northern industry was booming. The South still relied mostly on agriculture and though recruitment was high initially, it later decreased as the war dragged on.
Answer:Fort Sumter - it was the start of open combat between North and South
Battle of Antietam - 26,000 people die - bloodiest day in US history
Explanation: Hope this helps :)
