Final answer:
The two most important battles in the Civil War were the Battle of Gettysburg and the Battle of Antietam.
Step-by-step explanation:
The two most important battles in the Civil War were the Battle of Gettysburg and the Battle of Antietam. The Battle of Gettysburg took place in 1863 and was fought between the Confederate Army led by General Robert E. Lee and the Union Army led by General George G. Meade. The Battle of Antietam, also known as the Battle of Sharpsburg, occurred in 1862 and was fought between the Confederate Army led by General Robert E. Lee and the Union Army led by General George B. McClellan.