The Civil War began with

Question

a
illegal formation of the Confederate States of America
b
the Confederate attack on Fort Sumter
c
secession of South Carolina
d
attack on the Lawrence, Kansas, a center of free-soiler activity

Answer 1

The Civil War began with b) the Confederate attack on Fort Sumter. This event occurred on April 12, 1861, and marked the official start of the conflict between the Union and the Confederate States.