Question

What action started the Civil War?

Lincoln rejected the Crittenden Compromise, saying it would "lose us everything we gained by the election."
Confederate troops seized the federal fort guarding the harbor in Charleston, South Carolina.
Seven southern states seceded from the Union and formed the Confederate States of America
President Lincoln sent troops to Charleston, South Carolina, to protect Fort Sumter.

Answer 1

Confederate troops seized the federal fort guarding the harbor in Charleston, South Carolina.

Step-by-step explanation: