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History
Confederate States
Name	Ivy
Namesake	V.H. Ivy
Owner	Confederate States Navy
Builder	Burtis
Launched	1845
Commissioned	May 16, 1861
Fate	Destroyed to prevent capture at Liverpool Landing, Yazoo River, May 1863
General characteristics
Tons burthen	447 tons
Length	191 ft (58 m)
Beam	28 ft (8.5 m)
Draft	9 ft (2.7 m)
Propulsion	Side paddle wheels, one vertical condensing beam engine; cylinders, 44” diameter, 11’ stroke
Speed	12 knots (22 km/h; 14 mph)
Complement	60 officers and men
Armament	1 8”-smoothbore, 1 32-pounder rifle

CSS Ivy was a sidewheel steamer and privateer purchased by Commodore Lawrence Rousseau for service with the Confederate States Navy, and chosen by Commodore George Hollins for his Mosquito Fleet. The Mosquito Fleet was a group of riverboats converted to gunboats, and used to defend the Mississippi River in the area of New Orleans during the American Civil War.

Equipped with a powerful rifled 32-pounder, Ivy fought with the Mosquito Fleet at the Confederate victory of the Battle of the Head of Passes and their defeat at the Battle of Island Number 10. Subsequently, trapped in the Yazoo River, Ivy was destroyed to prevent her capture by the Union in May 1863.

Description

Ivy was 191 feet (58.2 m) long overall, had a beam of 28 feet (8.5 m) and a draft of 9 feet (2.7 m).^[3] Her two side paddle wheels were powered by a large, sophisticated walking beam engine and multiple boiler propulsion system with 44 inches (112 cm) diameter cylinders on an 11 foot (3.4 m) stroke, giving a maximum speed of 12 knots (22 km/h; 14 mph).^[1] She had a complement of 60 officers and men.^[3]

As a privateer Ivy was armed with two brass 24-pounder smoothbore howitzers. As a riverboat her armament was increased to an eight-inch smoothbore mounted aft, and a 32-pounder rifled gun mounted on a forward pivot position on the bow. The conventional description of "rifled 32-pounder" is misleading, however. This gun was a former 32-pounder smoothbore that had been "modernized" by rifling the barrel, and machining and shrinking a single layer of red hot bands of wrought iron onto the breech of the barrel to allow it to operate at much greater breech pressures. This rifling and banding allowed the gun to fire a 100-pound (6.4-inch diameter) conical shot or shell at much greater ranges than would be possible with 32-pound round shot fired out of a smoothbore barrel. This modification was similar to the James rifle process used to produce siege guns, and the resulting gun tube resembled a Parrott rifle. This gun could be much more accurately described as a 6.4 inches (16 cm) banded rifle, and was the most powerful long range weapon in the mosquito fleet.^[4]^[5]

Privateer

As a privately owned commercial vessel, Ivy had been known as Roger Williams and El-Paraguay. CSS Ivy began her Civil War career as a New Orleans-based privateer V.H. Ivy, sent out to capture Union commercial vessels once Jefferson Davis authorized the distribution of letters of marque and reprisal to private citizens after hostilities began in April 1861. Ivy did well at this, capturing four northern registered vessels. One of these was the icebreaker Enoch Train, which was purchased by private investors and rebuilt as the privateer ironclad ram Manassas. This vessel in turn was commandeered by Commodore Hollins as CSS Manassas.^[6]

Mosquito fleet

Blockade of the Mississippi

The Union Blockade arrived at the mouth of the Mississippi on May 27, 1861, when USS Brooklyn took up position. This event energized defense efforts in New Orleans and led to the replacement of Rousseau with Commodore Hollins in July 1861 to command the river defense. By August, Hollins had established his mosquito fleet for defense of the river in the area of New Orleans. The fleet consisted of CSS McRae, the flagship CSS Tuscarora, CSS Livingston, CSS Calhoun, CSS Jackson, and Ivy. Ivy was the fastest ship of the fleet and so was made the reconnaissance vessel, with increased firepower.^[7]

Battle of the Head of Passes

Ivy began patrolling the Mississippi River south of Forts Jackson and St. Phillip beginning in September 1861, captained by Lieutenant Fry of the CSN. On September 19 she encountered USS Water Witch. Water Witch was scouting the Head of Passes for the blockade fleet, which was planning to occupy the Head of Passes and set up a shore battery to control this strategic point. On October 5 Ivy reported the Head of Passes occupied by three vessels of the Union fleet, and shelled them with her bow pivot gun. Returning to the forts, Fry warned Hollins that the Union fleet was establishing a base at the Head of Passes. Hollins decided that the advance of the Blockade Fleet was a significant threat to New Orleans and moved to attack with the entire mosquito fleet. This attack resulted in the Battle of the Head of Passes, a Confederate victory which routed the Blockade Fleet and sent it back to the mouth of the Southwest Passage.^[9]

Battle of Island Number 10

This victory reinforced the idea in the Confederate War Department that Flag Officer Foote's Union Mississippi River Squadron at the north end of the Mississippi was the greatest threat to the Confederacy. The Battle of Fort Henry, the Battle of Fort Donelson, and the Battle of Shiloh lent a lot of credibility to this idea. As a result, the mosquito fleet and Ivy were ordered to the upper Mississippi and took part in the Battle of Island Number 10.^[10] Island Number 10 was a defeat for the Confederate forces involved. The mosquito fleet could not match USS Pittsburgh and Carondelet after these ships successfully ran the Confederate batteries, and it was forced to retreat.^[11]

Destruction

Commander McBlair CSN at Memphis, being informed that New Orleans had fallen after the Battle of Forts Jackson and St. Philip, ordered the remaining Confederate vessels on the Mississippi to concentrate at Yazoo City, Mississippi, on the Yazoo River. He regarded this harbor as the only safe place remaining on the Mississippi River network for the Confederate Navy to maintain a base.^[11]

This remaining refuge did not prove safe for long. In May 1863, Rear Admiral David Dixon Porter ordered a fleet under the command of Lieutenant-commander Walker to destroy Confederate commerce on the Yazoo River. This force consisted of USS Baron De Kalb, Forest Rose, Linden, Signal, and Petrel. With Forest Rose acting as a minesweeper, this force advanced steadily up the Yazoo River, from May 24–31. Fearing the capture of their vessels on the Yazoo, Confederate forces destroyed CSS Ivy, Star of the West, and the transports Arcadia and Magenta.^[12]

References

Abbreviations used in these notes: Official atlas: Atlas to accompany the official records of the Union and Confederate armies.; ORA (Official records, armies): War of the Rebellion: a compilation of the official records of the Union and Confederate Armies.; ORN (Official records, navies): Official records of the Union and Confederate Navies in the War of the Rebellion.

^ ^a ^b ORN II, v. 1, p. 256.
^ Silverstone, Paul H. (1989). Warships of the Civil War Navies. Naval Institute Press, Annapolis, Maryland. p. 229. ISBN 0-87021-783-6.
^ ^a ^b Washington :Navy Dept., Office of the Chief of Naval Operations; Mooney, James L.; United States. Naval History Division; Naval Historical Center (U.S.) (1959). Dictionary of American naval fighting ships. George A. Smathers Libraries University of Florida. Washington : Navy Dept., Office of the Chief of Naval Operations, Naval History Division : For sale by the Supt. of Docs., U.S.
^ Lindsay (1989). Mechanics Notebook 23, 1880 Ordnance, Ordnance Construction, Gun Carriages, Machine Guns & Manufacture of Ordnance. Lindsay Publications Inc. p. 14.
^ Konstam, Angus (2001). Confederate Ironclad 1861–65. Osprey Publishing Ltd. p. 22. ISBN 978-1-84176-307-1.
^ Hearn, Chester G. (1995). The Capture of New Orleans 1862. Louisiana State University Press. p. 37. ISBN 0-8071-1945-8.
^ Hearn, pp. 70–1.
^ ORN I, v. 18, p. 131.
^ Hearn, pp. 82–3.
^ Hearn, p. 169.
^ ^a ^b ORN II, v. 1, p. 798.
^ ORN I, v. 25, pp. 133–4.