The Battle of Shiloh was crucial in the Revolutionary War. The significance it had was that although both sides of the war claimed victory, the Union technically had a more major win over the Confederacy because they took control of the Mississippi River, and that split the Confederacy in half overall. The Union fought hard, the Battle of Shiloh was one of their first major victories, and this sparked confidence within the Union troops and motivated the troops to work even harder. This paid off by the end of the Civil War when the Union conquered the majority of the South and devastated the economy in the name of slavery abolition. If you need help understanding better, let me know and I will gladly assist you.