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April 6–7, 1862Reputable sourceWell documented

The Battle of Shiloh

On the timeline · around April 6–7, 1862 · The Battle of Shiloh1862

What happened

In southwestern Tennessee, a surprise Confederate attack on Ulysses S. Grant's army was thrown back over two days of ferocious fighting. Around 23,000 men were killed, wounded, or missing — more than all of America's previous wars combined.

Why it matters

Shiloh's staggering toll shocked the nation into realizing the war's true cost, and the Union victory secured its hold on the Western theater.

Sources