Union Admiral David Farragut leads his flotilla through the Confederate defenses at Mobile, Alabama, to seal one of the last major Southern ports. The fall of Mobile Bay was a huge blow to the Confederacy, and the victory was the first in a series of successes that secured the reelection of Abraham Lincoln in 1864.
Mobile became the major Confederate port on the Gulf of Mexico after the fall of New Orleans, Louisiana, in April 1862. With blockade runners carrying critical supplies from Havana, Cuba, into Mobile, Union General Ulysses S. Grant made the capture of the port a top priority after assuming command of all Federal forces in early 1864.
Opposing Farragut's force of 17 warships was a Rebel squadron of only four ships; but it included the C.S.S. Tennessee, said to be the most powerful ironclad afloat. Farragut also had to contend with two powerful Confederate batteries inside of Forts Morgan and Gaines. On the morning of August 5, Farragut's force steamed into the mouth of Mobile Bay in two columns led by four ironclads and met a devastating fire that immediately sank one of Farragut's iron-hulled single-turret monitors, the U.S.S. Tecumseh. The rest of the fleet fell into confusion but Farragut rallied them with the words, "Damn the torpedoes. Full speed ahead!" Although the authenticity of the quote is questionable, it nevertheless became one of the most famous in history.
The Yankee fleet quickly knocked out the smaller Confederate ships, but the Tennessee fought a valiant battle against overwhelming odds before it sustained heavy damage and surrendered. The Union laid siege to Forts Morgan and Gaines, and both were captured within two weeks. Confederate forces remained in control of the city of Mobile, but the port was no longer available to blockade runners.
The Battle of Mobile Bay lifted the morale of the North. With Grant stalled at Petersburg, Virginia, and General William T. Sherman unable to capture Atlanta, the capture of the bay became the first in a series of Union victories that stretched to the fall election.