Answer:
West Virginia, is the right answer.
Step-by-step explanation:
The Battle of Fort Sumter took place on 12th-13th April 1861. The Battle of Sumter was the bombardment of Fort Sumter by the militia of South Carolina and the gunfire in return by the Army of the United States and later its surrender. This battle resulted in the Civil War in America.
However, before and after the end of the Battle of Fort Sumter the states that remained neutral had to take a position about it. In the South, most of the states such as Tennesee, Arkansas and Virginia joined the confederacy. At the same time, the States of West Virginia was created after some people denied to join the confederacy as Virginia and other states.