Constellation remained bottled up in Hampton Roads for the duration of the War of 1812, but Tattnall and his comrades still managed to get into the fray. He was among the 100 or so sailors and marines assigned to the shore battery on Craney Island. On 22 June 1813, the British attempted to carry the island by storm in preparation for an attack on nearby Norfolk. Tattnall's battery and a force of American boats gave the attackers a sound rebuff that deterred the British from further attempts to take the city.

In April 1814, Midshipman Tattnall was detached from Constellation and, by 24 August, was in command of a force of employees from the Washington Navy Yard. He led them into battle at Bladensburg in an unsuccessful effort to stop the British advance on the American capital. On 14 October, he was ordered to Savannah for duty in Epervier. In May 1815, that sloop sailed for the Mediterranean with Commodore Stephen Decatur’s squadron to chastise the Algerine pirates. On 17 June, she participated in the capture of the frigate Mashuda and, two days later, of the brig Estedio. In July, when Epervier was ordered back to the United States with dispatches, Tattnall remained in the Mediterranean in Constellation. In January 1817, he transferred to Ontario and returned in her to the United States.

Promoted to lieutenant on 1 April 1818, Tattnall was assigned to the frigate Macedonian on 30 June, and he sailed in her for the Pacific in November. He was detached from Macedonian on 30 August 1820 and returned to the United States. Ordered to Norfolk on 26 December 1822, he joined Commodore David Porter’s squadron in schooner Jackall. Lt. Tattnall served in the West Indies on an expedition to suppress piracy until he was detached on 4 May 1823. On 23 June 1824, Tattnall was ordered to Constitution for Mediterranean service. In March 1826, he transferred to Brandywine and returned home in her in May. On the 15th of that month, he was granted six months leave, which was later extended into 1828.

Tattnall served in Erie from October 1828 to August 1829 and then went on to survey the Tortugas until March 1830. Lt. Tattnall took command of schooner Grampus on 15 April 1831 and cruised the West Indies and the Gulf of Mexico. In August 1832, he captured the Mexican schooner, Montezuma, which had boarded and robbed an American ship on the high seas. He was detached from Grampus in September 1832 and went on leave awaiting orders for almost four years before being ordered in, July 1836, to recruit men for Capt. Thomas ap Catesby Jones’ survey and exploration expedition.

Tattnall was promoted to commander on 25 February 1836 and, in April, reported for a three-year tour of duty at the Boston Navy Yard. Following service with the Mediterranean and African squadrons, Comdr. Tattnall joined the Mosquito Division in the Gulf of Mexico in 1846, commanding the steam gunboat, Spitfire. During the Mexican War, he took part in the attacks on Vera Cruz, San Juan d’Ulloa, and Tuxpan, and he suffered an arm wound. For his gallantry before Vera Cruz, the state of Georgia presented him with a sword.

In 1848 and 1849, he returned to shore duty at the Boston Navy Yard. On 5 February 1850, he was commissioned captain and, the following month, was given command of Saranac. Next, he commanded the Pensacola Navy Yard from July 1851 to June 1854. From August 1854 to November 1855, Capt. Tattnall was flag captain in Independence to Commodore Mervine on the Pacific Station. At Hong Kong on 29 January 1858, he relieved Commodore Armstrong taking command of the East India Squadron, breaking his flag in San Jacinto. During his two years in the Far East, Commodore Tattnall came to the assistance of a British squadron under fire from the Barrier Forts at the mouth of the Pei Ho River and, on his return voyage early in 1860, carried the first diplomatic embassy from Japan to the United States.

At the outbreak of the Civil War, Capt. Tattnall held command of the Sackett’s Harbor Station. Though he opposed secession, Tattnall resigned his commission on 21 February 1861. A week later, Governor Joseph E. Brown commissioned Tattnall as the senior flag officer of the Navy of Georgia. On 26 March 1861, he received his commission as a captain in the Confederate Navy. Tattnall commanded Southern naval units during the defense of Port Royal until the harbor was captured by Union forces on 7 November 1861. From there, he moved to overall command of the defense of Virginia’s waters early in March 1862. Tattnall, by then a flag officer in the Confederate Navy as well as the Navy of Georgia, directed CSS Jamestown and other warships in captures of Federal merchantmen off Sewell’s Point in April 1862.

On 11 May 1862, in the face of advancing Federal forces, Flag Officer Tattnall ordered the destruction of his flagship, CSS Virginia (ex-Merrimack). He was later acquitted by a court martial of all charges stemming from that action. He resumed command of the naval defense of Georgia on 29 May 1862 and retained it until 31 March 1863, when he turned over command of forces afloat to Comdr. Richard Page and concentrated upon the shore defenses of Savannah. When Savannah fell to General Sherman’s troops, Tattnall became a prisoner of war. He was paroled on 9 May 1865 and, soon thereafter, took up residence once more in Savannah.

Capt. Tattnall died there on 14 June 1871 and was buried in Bonaventura Cemetery.

Source: Naval History & Heritage Command including Dictionary of American Naval Fighting Ships.