After the conquest of Fort Henry on Feb. 6, 1862, Grant invested Fort Donelson with 25,000 men and the support of Commodore Foote's gunboats flotilla, on Feb. 12.
On Feb. 14 the defenders repulsed an attack of the gunboats, which withdrew.
On Feb. 15 the Confederate garrison attempted to force an escape route southward.
They struck the right of Grant Army but were unable to exploit their success and retreated back to their initial positions, pursued by the Federals who strengthened the siege.
The situation of the defenders had now become desperate and on Feb. 16 the Confederates surrendered unconditionally to Grant.
The fall of Fort Henry and Fort Donelson opened the way for the Union Armies to move up the Tennessee deep into Confederate territory.
Fort Donnelson Vicksburg Chattanooga
Fort Donelson
The first battle of the civil war happened at fort Sumter on April 12 1861
The Battle of Fort Henry, February 6, 1862, during the American Civil War, was the first important victory for the Union.
The first battle of the civil war at Fort Sumter.
I think you mean Fort Sumter...
confederates
The first shots of the US Civil War were fired.
The Civil War started in Fort Sumter, South Carolina. That was where the first shots were fired. This happened in 1861.
Fort Bowie.
Fort Sumter
Fort Sumter