The Civil War began with

Question

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

Answer 1

The Civil War began with d - the Confederate attack on Fort Sumter. This attack occurred on April 12, 1861, and marked the official start of armed conflict between the Northern states (the Union) and the Southern states (the Confederacy).