Answer:
to discourage a Soviet attack
Explanation:
I think so if the answer is wrong. Please forgive me.
Photo attached with answer
It's d. ENIACE, baby boom
The South was speaking to Britain and France and was asking for military aid against the North and basically they said "Hey win a strategic battle on Northern land and we will help you." Well after the South didnt win the battle because in all terms the Battle of Antietam was more a draw then a loss for either side but because it wasnt an outright victory both the British and French retracted their offer of aid.