Public opinion spoke of the large number of deaths that the battle produced, they thought it was incredible the number of deaths, injuries and losses that the battle produced.
The battle of Shiloh, was the greatest confrontation on the western stage of the American Civil War, held between April 6 and 7, 1862, southwest of Tennessee. The forces of the Confederate states, under the command of Generals Albert Sidney Johnston and P. G. T. Beauregard, launched a surprise attack on the Union Army led by Major General Ulysses S. Grant, being close to defeating them.
General Buell's reinforcements arrived at dusk and they turned the situation around the next morning, when Grant launched a counterattack along with the entire front line. The Confederates were forced to withdraw from the bloodiest battle recorded in the history of the United States until that moment, ending their hopes of blocking the invasion of Union forces advancing from the north of the Mississippi.