First Barbary War

Syren departed Philadelphia on 27 August 1803 and reached Gibraltar on 1 October. A fortnight later she sailed via Livorno to Algiers carrying presents and money to the Dey of Algiers. She then sailed to Syracuse, Sicily, where she arrived early in January 1804.^[2]

The first action Syren was involved in was an attack aimed at destroying USS Philadelphia, a frigate that had run aground the previous autumn and that Tripolitan gunboats had then captured. To prevent Philadelphia from opposing his planned operations against Tripoli, the commander of the American squadron in the Mediterranean, Commodore Edward Preble, decided to destroy her. To achieve this, Syren and ketch Intrepid sailed from Syracuse on 3 February 1804 and proceeded to Tripoli, which they reached on 7 February. However, before the American ships could launch their attack, they were driven off by a violent gale and did not get back off Tripoli until 16 February. Before the attack Syren tied up alongside Intrepid to transfer some of her crew for the assault on Philadelphia. Aboard Intrepid, under the command of Stephen Decatur, sailors from both Intrepid and Syren succeeded in burning Philadelphia. Also present during the assault was Thomas Macdonough of Syren.^[2][4]

Bombardment of Tripoli, 1804

Syren returned to Syracuse on the morning of 19 February. On 9 March, she and Nautilus sailed for Tripoli. Soon after their arrival, on 21 March 1804, she captured the armed brig Transfer belonging to the Pasha. Stewart took Transfer into US service and renamed her USS Scourge.^[5] She then served in the American squadron.^[2] The very next day Syren captured a polacca named Madona Catapolcana and sent her to Malta.^[5] Operations in the Mediterranean during the spring and summer of 1804 and participated in the attacks on Tripoli in August and September 1804. The ship continued to support the squadron's operation against Tripoli which forced the Pasha to accede to American demands. After a peace treaty with Tripoli was signed on 10 June 1805, the brig remained in the Mediterranean commanded by Master Commandant John Smith for almost a year helping to establish and maintain satisfactory relations with other Barbary states.^[2]

The ship returned to America in May 1806 and reached the Washington Navy Yard in August. She was laid up in ordinary there until recommissioned in 1807 and subsequently carried dispatches to France in 1809.^[2] In 1809, her sailing master at the Norfolk Navy Yard was Captain John "Mad Jack" Percival.^[6] The following year, her name was changed to Siren.^[7]

War of 1812

Little record has been found of the brig's service during the War of 1812, however small news items appeared in the Salem Gazette and the Boston Gazette.

In May 1813 it was reported that within the space of two days a merchant vessel, Pilgrim, was boarded, first by HMS Herald which was searching for Syren, and then by Syren, which was searching for Herald. Syren was now commanded by Lieutenant Joseph Bainbridge.^[8] The following month Syren left Belize and proceeded to Cuba where after three weeks searching for a Royal Navy sloop, probably Herald, she sailed for the coast of Florida putting in at New Orleans before departing on 9 May 1813. No prizes were taken during this voyage and the ship needed repairs.^[9]

By January 1814 Syren was in Massachusetts and was now commanded by Lieutenant Parker,^[10] In February she sailed along with a privateer, Grand Turk.^[11] Not long after sailing Parker died and command transferred to Lieutenant N.J. Nicholson.^[12]

Syren captured at least three merchant ships off the coast of Africa. On 28 May she captured and burnt Barton, Hassler, master, which had been sailing from Africa to Liverpool. Then on 1 June Syren captured Adventure, which too was from Africa to Liverpool. She took-off their cargoes of ivory and sank them. Lastly, at some point Syren captured Catherine.^[13]

On 12 July 1814 Syren while cruising off the West African coast encountered the British ship HMS Medway a 74-gun third rate ship of the line under the command of Captain Augustus Brine. Heavily outgunned, Syren attempted to run. After an 11-hour chase Medway captured her despite Syren having lightened her load by throwing overboard her guns, anchors and boats.^[14] During her last voyage she had captured or sunk several British merchantmen.^[12][15] Among the prisoners was Samuel Leech, who later wrote an account of his experiences.

According to Samuel Leech, after being captured the crew of Syren were taken to the Cape of Good Hope, and after landing at Simonstown, marched to a jail in Cape Town. Here they were held until transferred to England when the war was over. On arriving at Simonstown, other American prisoners were seen to be leaving the jail and being shipped off to Dartmoor. The Syren crew met these again in England while waiting for transfer to the United States. Some had been present at 'The Massacre'.