US Civil War

the public was shocked and horrified by the large number of dead and injured. (novanet)

agriculture

Conscription, Selective Service, the draft.

The south generally didn't make as much supplies and arms as the north because the north had the industrial revolution which allowed things to be made faster and cheaper instead of having to have each handmade by a gunsmith. Also, the south around that time were busy growing and selling cotton on large plantations.

Lincoln wanted to keep the border states in the Union.

He wanted to avoid war and keep the nation together. He tried to compromise, thinking he could find a peaceful way to prevent war and secession. When he realized that war was inevitable, and it would be violent and bloody, he decided that the post war United States of America should be a free nation with no slaves. That the deaths and killing in the Civil War should be for a purpose, and to end slavery in the USA once and for all.

because of antislavery sentiment at home and abroad