The United States maintained neutrality up until the point where Japan bombed Pearl Harbor. After that, it was impossible for the US to keep to itself.
Answer: Appomattox matched with General Robert E Lee surrendered to General Ulysses S. Grant
Manassas matched with First battle with heavy casualties
Gettysburg matched with Turned the tide of the war in the North's favor.
Fort Sumter matched with Where the Civil War began
Explanation:
I took the test hopes this helps :D