David Dixon Porter was a United States Navy admiral and a member of one of the most distinguished families in the history of the U.S. Navy. Promoted as the second U.S. Navy officer ever to attain the rank of admiral, after his adoptive brother David G. Farragut, Porter helped improve the Navy as the Superintendent of the U.S. Naval Academy after significant service in the American Civil War.
Porter began naval service as a midshipman at the age of 10 years under his father, Commodore David Porter, on the frigate USS John Adams. For the remainder of his life, he was associated with the sea. Porter served in the Mexican War in the attack on the fort at the City of Vera Cruz. At the outbreak of the Civil War, he was part of a plan to hold Fort Pickens, near Pensacola, Florida, for the Union; its execution disrupted the effort to relieve the garrison at Fort Sumter, leading to Sumter's fall. Porter commanded an independent flotilla of mortar boats at the capture of New Orleans. Later, he was advanced to the rank of rear admiral in command of the Mississippi River Squadron, which cooperated with the army under Major General Ulysses S. Grant in the Vicksburg Campaign.