The Rhine River (sorry about the late answer)
Answer:
The victory at the battle of Antietam gave Abraham Lincoln a platform to issue the Proclamation from a position of strength
Explanation:
This changed the character of the Civil War and prevented the European powers from intervening on behave of their trading partners of the southern Confederacy
Answer is in a photo. I can only upload it to a file hosting service. link below!
I'm pretty sure all of them are correct. I know for a fact the first three are.
