The Battle of Shiloh was a major engagement in the American Civil War's Western Theater, fought on April 6–7, 1862, in southwestern Tennessee near a small church named Shiloh and Pittsburg Landing on the Tennessee River. The Confederate Army of Mississippi sought to achieve a decisive victory by attacking Union forces under Major General Ulysses S. Grant before reinforcements could arrive and resupply his Army of the Tennessee.
The battle unfolded over two days with dramatically shifting momentum. On April 6, the Confederate forces, commanded by General Albert Sidney Johnston, launched a surprise attack and made considerable gains against Grant's army. However, the tide of battle shifted when Johnston was mortally wounded during the fighting. Command of Confederate forces passed to his second-in-command, General P. G. T. Beauregard. Overnight, Grant received crucial reinforcement when one of his divisions stationed farther north arrived to support the Army of the Tennessee. Additionally, portions of the Army of the Ohio under Major General Don Carlos Buell joined the Union forces, significantly strengthening Grant's position.
With these reinforcements in place, the Union conducted an unexpected counterattack on April 7, ultimately achieving victory. The battle demonstrated that the conflict would not be quickly resolved and highlighted the importance of strategic positioning and reinforcement in Civil War operations. The Confederate failure to eliminate Grant's army before it could be reinforced represented a missed opportunity, and the heavy casualties on both sides signaled the brutal nature of the conflict that would characterize the remaining years of the war.
The American Civil War (1861–1865) was the deadliest conflict in American history, killing an estimated 620,000 to 750,000 soldiers and an unknown number of civilians. The Confederate States of America, formed by eleven seceding Southern states, faced the Union in four years of warfare across 23 states and territories. Major engagements included First and Second Bull Run, Antietam (the bloodiest single day in American history, September 17, 1862), Chancellorsville, Gettysburg (July 1–3, 1863), Vicksburg (surrendered July 4, 1863), and Sherman's March through Georgia and the Carolinas (1864–1865). President Lincoln issued the Emancipation Proclamation on January 1, 1863, transforming the war's stated purpose to include the abolition of slavery and enabling the enlistment of approximately 180,000 Black men in the United States Colored Troops. Confederate General Robert E. Lee surrendered to Ulysses S. Grant at Appomattox Court House on April 9, 1865. The war resolved the question of secession and ended American slavery, though Reconstruction would face sustained resistance in its attempt to secure civil rights for formerly enslaved people.
Union: ~395; Confederate: ~632
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