Battle of Derne

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This article is about the battle in the 19th century. For the battle in Italo-Turkish war, see Battle of Derna (1912).
Battle of Derne
Part of the First Barbary War
Attack on Derna by Charles Waterhouse 01.jpg
William Eaton leading the attack on Derne with the Marines, soldiers and mercenaries under his command
Date April 27-May 13, 1805
Location Derne, Cyrenaica
Result Decisive American victory
 United States Flag of Tripoli 18th century.svg Eyalet of Tripolitania
Commanders and leaders
William Eaton
Presley O’Bannon
Oliver Hazard Perry
Hamet Bey
Hassan Bey
8 marine officers
400-500 mercenaries
Unknown artillery
1 sloop-of-war
1 brig
1 schooner
4,000 infantry, cavalry
Unknown artillery
Casualties and losses
United States:
2 killed
3 wounded
Christian mercenaries:
9 killed and wounded
Muslim mercenaries:

The Battle of Derne was the decisive victory of a mercenary army recruited and led by U.S. Marines under the command of U.S. Army Lieutenant William Eaton and U.S. Marine Corps First Lieutenant Presley Neville O’Bannon. The battle involved a forced 600-mile march through the desert to the city of Derna, Libya, which was defended by a much larger force.[1]



Commodore Samuel Barron, the new naval commander in the Mediterranean, provided Eaton with naval support from USS Nautilus, USS Hornet and USS Argus. The three vessels were to provide offshore bombardment support.[3] Nautilus was commanded by Oliver Hazard Perry, Hornet by Samuel Evans, and Argus by Isaac Hull.[citation needed]

A small detachment of U.S. Marines was given to Eaton commanded by First Lieutenant Presley O'Bannon. Eaton and Hull based their operations at Alexandria, Egypt. With the help of Hamet Karamanli, they recruited about 400 Arab and Greek mercenaries.[4] Eaton became general and commander-in-chief of the combined force.[5]

On March 6, 1805, Lieutenant Eaton (having designated himself as general and commander in chief) began to lead his forces on a 600 miles (970 km) trek across the Libyan desert.[6] Their objective was the port city of Derne, capital of the province of Cyrenaica. The mercenary forces were promised supplies and money when they reached the city. During the 50-day trek, Eaton became worried over the relationship between the Christian Greeks and the roughly 200 to 300 Muslim mercenaries. Mutiny threatened the success of the expedition on several occasions. Between March 10 and March 18, several Arab camel drivers mutinied before reaching the sanctuary of the Massouah Castle. From March 22 to March 30, several Arab mercenaries under the command of Sheik el Tahib staged mutinies. By April 8, when he crossed the border into Libya Tripoli, Eaton had quelled the Arab mutinies. In late April, his army finally reached the port city of Bomba, some miles up the coast from Derne, where Argus, Nautilus and Hornet were waiting for him. Eaton received fresh supplies and the money to pay his mercenaries.


On the morning of April 26, Eaton sent a letter to Mustafa Bey, the governor of Derne, asking for safe passage through the city and additional supplies, though Eaton realized the governor probably would not agree. Mustafa reportedly wrote back, "My head or yours!". On the morning of April 27, Eaton observed a fort in Derne with eight guns. He believed the majority of the population would prefer to be ruled by Hamet. Argus sent a cannon ashore to use in the attack. Hull's ships then opened fire and bombarded Derne's batteries for an hour. Meanwhile, Eaton divided his army into two separate attacking parties. Hamet was to lead the Arab mercenaries southwest to cut the road to Tripoli, then attack the city's left flank and storm the weakly defended governor's palace. Eaton with the rest of the mercenaries and the squad of Marines would attack the harbor fortress. Hull and the ships would fire on the heavily defended port batteries. The attack began at 2:45 p.m., with Lt. O'Bannon and his Marines leading the advance. O'Bannon led his Marines and 50 Greek gunners with the field piece from Argus, though the gun's effectiveness was lessened after the crew carelessly left the ramrod in the tube and fired it down range. The harbor defenses had been reinforced, and the attackers were temporarily halted. But this had weakened the defenses elsewhere and allowed the Arab mercenaries to ride unopposed into the western section of the city.[7]

Eaton's mercenary army was hesitant under the enemy's musket fire, and he realized a charge was the only way to regain the initiative. Leading the charge, he was seriously wounded in the wrist by a musketball. On Argus, Hull saw the Americans and mercenaries were "gaining ground very fast though a heavy fire of Musquetry [sic] was constantly kept upon them." The ships ceased fire to allow the charge to continue. Eaton would report that O'Bannon with his Marines and Greeks "pass'd through a shower of Musketry from the Walls of houses, took possession of the Battery". The defenders fled in haste, leaving their cannons loaded and ready to fire. O'Bannon raised the American flag over the battery, and Eaton turned the captured guns on the city. Hamet's force had seized the governor's palace and secured the western part of the city. Many of the defenders of the harbor fortress fled through the town and ran into Hamet's force. By 4:00 p.m. the entire city had fallen, and for the first time, an American flag flew over fortifications on the opposite side of the Atlantic Ocean.[7]

Yusuf was aware of the attack on Derne and had sent reinforcements to the city. By the time this force arrived, however, the city had fallen. His men dug in and prepared to recapture the city. Eaton fortified his new position, while Hamet took up residence in the governor's palace and had his Arabs patrolling the outer areas of the city. Yusuf's men dug in south of the city and waited. On May 13, they attacked the city and drove Hamet's Arabs back, almost recapturing the governor's palace. Argus and Eaton's captured batteries pounded the attackers, who finally fled under heavy fire. Nightfall found both sides back in their original positions. Skirmishes and several other minor attempts were made on the city in the following weeks, but the city remained in American control. From Derne, Eaton now planned to march across the desert and attack Tripoli from the land. During his march he was informed of the treaty signed between Tobias Lear and Yusuf Karamanli. In the middle of his trek Eaton was ordered to return to Egypt with Hamet.[citation needed]


The Battle of Derne was the first land battle of the United States on foreign soil after the American Revolutionary War.[8] It was the decisive action of the First Barbary War, although Eaton was furious over what he called a 'sell-out' between Consul Lear and the bey. Hamet returned to Egypt and the mercenaries were never fully paid.

William Eaton returned to the United States as a national hero. Legend holds that O'Bannon was presented a Mameluke sword by Hamet, the Ottoman Empire viceroy. No evidence supports this claim. The first mention of Hamet giving O'Bannon a bejeweled sword seems to be in a lengthy article, "Kentucky Officer First to Carry Stars and Stripes to Victory in Foreign Country," by John Presley Cain in the 29 July 1917 edition of the Louisville Courier-Journal. One sword that was purported to be the sword in question turned out to be a late-Victorian era forgery. [9] He was later awarded a sword of honor by his home state of Virginia. A further legend holds that O'Bannon's exploits in North Africa inspired the Marine Corps officers to adopt Mameluk swords, but this is also uncorroborated by any contemporaneous sources. Swords of this style were very popular in Europe and a more likely scenario is that the Marines were imitating the influential military leaders who were wearing them.[10] The attack on Derne was the inspiration for the lyrics of the Marines' Hymn "to the shores of Tripoli".[11]

In popular culture[edit]

The 1950 American film Tripoli is a fictionalized account of the Battle of Derne.


  1. ^ Naval History and Heritage Command, Battle of Derne, April 27, 1805, Selected Naval Documents
  6. ^ "1775: Founding of the Marine Corps". 
  9. ^


Further reading[edit]
