History
United States
Laid down	date unknown
Launched	1864
Commissioned	8 August 1864
Out of service	3 June 1865
Stricken	1865 (est.)
Fate	Returned to the War Department 3 June 1865
General characteristics
Displacement	184 tons
Length	165 ft (50 m)
Beam	26 ft (7.9 m)
Draught	depth of hold 4 ft 6 in (1.37 m)
Propulsion	steam engine side wheel-propelled
Speed	not known
Complement	not known
Armament	two 20-pounder Parrott rifles four 24-pounder howitzers

USS General Thomas was a Steamship chartered from the U.S. War Department by the Union Navy during the American Civil War. Named after Maj. Gen. George Henry Thomas, she was used by the Navy as a gunboat in waterways of the Confederate South.

General Thomas was one of four light wooden gunboats built at Chattanooga, Tennessee, for the War Department in 1864. After cruising on the Ohio River without being formally commissioned in June and July 1864, she commissioned 8 August 1864 at Bridgeport, Alabama, Acting Master Gilbert Morton in command.

Assigned to the 11th district of the Mississippi Squadron, commanded by Lt. Mordeau Forrest, General Thomas served as a patrol vessel on the Tennessee River, above Muscle Shoals, Alabama.

During this period Confederate General John Bell Hood was mounting his campaign into Tennessee to divert General William Tecumseh Sherman's march on Atlanta, Georgia, and General Thomas patrolled the river unceasingly to prevent the Southern troops from crossing.

At Decatur, Alabama, 28 October 1864, the gunboat engaged strong batteries from General John Bell Hood's army. After passing the batteries downstream and sustaining several hits, General Thomas rounded to and, with Union Army gunboat Stone River, poured such a withering crossfire into the emplacements that the Confederates were forced to withdraw.

After Hood's repulse at Nashville, Tennessee in December, General Thomas was used on the upper Tennessee River to block his escape route. She aided General James B. Steedman in his successful attack on Decatur 27 December by giving his army concentrated gunfire support, and attempted to pass over Elk River Shoals to prevent a Southern crossing of the river. The Tennessee River was too low, however, and Forrest and his gunboats could not cross.

General Thomas returned to Bridgeport 30 December 1864, but was soon active again. On 26 February 1865 she joined the other gunboats of the 11th district and, taking advantage of unusually high water, crossed Elk River Shoals. The ships destroyed the camp of Southern General Philip D. Roddey, captured a quantity of supplies and destroyed communications at Lamb's Ferry before returning to Bridgeport 4 March.

General Thomas continued to patrol between Bridgeport and Decatur, Alabama, until she was turned over to the War Department at Bridgeport 3 June 1865.

 This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.