Ulysses S. Grant issued his famous ultimatum at Fort Donelson, Tennessee: “No terms except unconditional and immediate surrender can be accepted. I propose to move immediately upon your works.” Confederate forces accepted. (17,398 casualties)
Navy gunboats captured Fort Henry, Tennessee, opening the Deep South to Union forces.
Secession conventions were held in Mississippi and Alabama. Louisiana elected delegates for a convention, and Tennessee called for a convention.
Tennessee became the last of eleven states to secede from the Union.
Confederates captured Fort Pillow, Tennessee. Witnesses later reported that Confederates shot down surrending Union soldiers, women, and children, including 300 African Americans.
The Constitutional Convention of Tennessee adopted an amendment abolishing slavery in the state.
The Ku Klux Klan was founded at the law offices of Thomas M. Jones in Pulaski, Tennessee.
Tennessee became the first rebel state re-admitted to Union.