April 6
Battle of Shiloh Begins in Tennessee
The surprise Confederate assault near Shiloh Church revealed the immense scale and brutality that would define the American Civil War.
Summary
After early Union successes in the western theater of the American Civil War, General Ulysses S. Grant advanced his Army of the Tennessee deep into Confederate territory along the Tennessee River. Confederate forces under General Albert Sidney Johnston concentrated to strike the Union encampment near Shiloh Church before reinforcements could arrive. On April 6, 1862, Johnston launched a surprise assault that drove Union troops back toward the river in fierce fighting across wooded terrain. Johnston himself was mortally wounded during the day, and command passed to General P.G.T. Beauregard. The Confederates nearly achieved a breakthrough but halted short of the Union landing site as darkness fell.
Context
Following Union victories at Forts Henry and Donelson in February 1862, Major General Ulysses S. Grant advanced his Army of the Tennessee along the Tennessee River with the goal of disrupting the vital Memphis and Charleston Railroad. Confederate forces under General Albert Sidney Johnston, having abandoned positions in Kentucky and Tennessee, gathered their scattered commands at Corinth, Mississippi, to mount a counterstroke before Grant could link with additional Union troops. The unfortified Union encampment near Pittsburg Landing lay vulnerable in wooded terrain around a small Methodist church known as Shiloh.
What Happened
On the morning of April 6, Johnston launched a coordinated surprise attack with roughly 45,000 men against Grant’s approximately 42,000 troops. Confederate divisions drove into the southernmost Union camps, pushing Federal soldiers northward through dense woods and open fields in confused, intense fighting. By mid-afternoon Johnston was mortally wounded while directing troops near the front, and command passed to General P.G.T. Beauregard. Although the Confederates gained ground and nearly reached the landing site, Union resistance stiffened around defensive positions such as the “Hornet’s Nest,” and the assault halted as darkness fell.
Overnight, Grant received critical reinforcements from Major General Don Carlos Buell’s Army of the Ohio. On April 7 the reinforced Union force launched a counterattack that gradually reclaimed lost ground. Beauregard ordered successive counterattacks but, facing superior numbers and exhausted troops, ordered a withdrawal toward Corinth by mid-afternoon.
Aftermath
The two-day battle produced roughly 23,700 casualties—more than 13,000 Union and 10,700 Confederate—far exceeding any previous engagement. Both armies remained largely immobilized for weeks while they recovered and reorganized. The Confederates fell back to Corinth, ceding control of the immediate area along the Tennessee River to Union forces.
Legacy
Shiloh demonstrated that the war would be neither brief nor inexpensive, shocking both sides with its casualties and dispelling hopes for a quick resolution. The battle secured Union dominance over key western river routes and opened the path for subsequent campaigns aimed at Vicksburg and ultimately Atlanta. Historians view it as the first great contest of the western theater and a turning point in public perception of the conflict’s duration and cost.
Why It Matters
The Battle of Shiloh demonstrated the scale and brutality that would characterize the Civil War, with combined casualties exceeding 23,000 in two days of fighting. It marked the first major engagement in the western theater and convinced both sides that the conflict would be long and costly rather than a quick victory. The battle secured Union control of key river routes and set the stage for further campaigns toward Vicksburg and Atlanta.
Related Questions
Who commanded the Union and Confederate forces at Shiloh?
Ulysses S. Grant led the Union Army of the Tennessee, while Albert Sidney Johnston commanded the Confederate Army of Mississippi until his death, after which P.G.T. Beauregard took command.
How many casualties occurred at the Battle of Shiloh?
Approximately 23,700 soldiers were killed, wounded, or missing—more than 13,000 Union and 10,700 Confederate—making it the bloodiest battle in American history up to that point.
What was the strategic result of the battle?
The Union retained control of Pittsburg Landing and the Tennessee River, while the Confederates withdrew to Corinth; the engagement opened the way for later Union offensives in the western theater.
Why is the battle also called Pittsburg Landing?
The fighting centered around the Union encampment and landing site on the Tennessee River known as Pittsburg Landing, near the Shiloh church that gave the battle its more common name.
Related Portfolio Site
US Military Atlas: Major battle in U.S. Civil War
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Sources
- Battle of Shiloh, Encyclopædia Britannica. Accessed 2026-07-09.