How was the Battle of Shiloh devastating to both sides?

The Battle of Shiloh, fought in April 1862, was devastating for both the Union and Confederate forces, resulting in approximately 23,000 casualties combined. The intense fighting revealed the brutal realities of war, as both sides faced significant losses in terms of personnel and morale. The high number of dead and wounded, along with the sheer scale of the battle, shocked the nation and underscored the war's potential for carnage. Additionally, the battle's outcome shifted military strategies and highlighted the necessity for more organized and prepared forces on both sides.