The First Barbary War (1801–1805), also known as the Tripolitan War and the Barbary Coast War, was a conflict during the 1801–1815 Barbary Wars, in which the United States fought against Ottoman Tripolitania. Tripolitania had declared war against the United States over disputes regarding tributary payments in exchange for a cessation of Tripolitanian commerce raiding at sea. United States president Thomas Jefferson refused to pay this tribute. The First Barbary War was the first major American war fought outside the New World, and in the Arab world, besides the American–Algerian War (1785–1795).
Barbary corsairs and crews from the quasi-independent North African Ottoman regencies of Algiers, Tunis, Tripoli, and the independent Sultanate of Morocco under the Alaouite dynasty (the Barbary Coast) utilized their naval forces for centuries across the Mediterranean. The capture of merchant ships, and enslavement and ransoming of their crews provided them with a source of wealth and naval power.
European responses included creation of the Trinitarian Order, (or order of "Mathurins") which operated from France for centuries with the special mission of collecting and disbursing funds for the relief and ransom of prisoners taken by Mediterranean pirates.
Beginning in the late 18th century, Barbary corsairs began attacks on American merchant shipping in an attempt to extort ransom for the lives of captured sailors, and ultimately tribute from the United States to avoid further attacks, as they had with the various European states.
Prior to signing of the Treaty of Paris, which formalized the United States' independence from Great Britain, American shipping was protected by France during the revolutionary years under the Treaty of Alliance (1778–83). Although the treaty did not mention the Barbary states in name, it referred to common enemies of both nations. Once the war concluded, piracy against America shipping began when the United States government lost its protection under the Treaty.
This lapse of protection by a European power led to the first American merchant ship being seized after the Treaty of Paris. On 11 October 1784, Moroccan pirates seized the brigantine Betsey. The Spanish government negotiated the freedom of the captured ship and crew; however, Spain advised the United States to offer tribute to prevent further attacks against merchant ships. The United States Minister to France, Thomas Jefferson, decided to send envoys to Morocco and Algeria to try to purchase treaties and the freedom of the captured sailors held by Algeria. Morocco was the first Barbary Coast state to sign a treaty with the United States, on 23 June 1786. This treaty formally ended all Moroccan piracy against American shipping interests. Specifically, article six of the treaty states that if any Americans captured by Moroccans or other Barbary Coast states docked at a Moroccan city, they would be set free and come under the protection of Morocco.
American diplomatic action with Algeria, the other major Barbary Coast state, was much less productive than with Morocco. Algeria began piracy against the United States on 25 July 1785 with the capture of the schooner Maria, and Dauphin a week later. All four Barbary Coast states demanded $660,000 each (equivalent to $16 million in 2025). However, the envoys were given only an allocated budget of $40,000 (equivalent to $980,000 in 2025) to achieve peace. Diplomatic talks to reach a reasonable sum for tribute or for the ransom of the captured sailors struggled to make any headway. The crews of Maria and Dauphin remained enslaved for over a decade, joined by crews of other ships captured by the Barbary states.
In March 1786, Jefferson and John Adams went to London to negotiate with Tripoli's envoy, ambassador Sidi Haji Abdrahaman (or Sidi Haji Abdul Rahman Adja). When they enquired "concerning the ground of the pretensions to make war upon nations who had done them no injury", the ambassador replied:
It was written in their Koran, that all nations which had not acknowledged the Prophet were sinners, whom it was the right and duty of the faithful to plunder and enslave; and that every mussulman who was slain in this warfare was sure to go to paradise. He said, also, that the man who was the first to board a vessel had one slave over and above his share, and that when they sprang to the deck of an enemy's ship, every sailor held a dagger in each hand and a third in his mouth; which usually struck such terror into the foe that they cried out for quarter at once.
Jefferson reported the conversation to Secretary of Foreign Affairs John Jay, who submitted the ambassador's comments and offer to Congress. The incident convinced Jefferson that paying further tribute would do nothing to prevent more attacks. Although Adams agreed with Jefferson, he believed that circumstances forced the United States to pay tribute; the United States had just fought an exhausting war, which put the nation deep into debt and unable to finance the establishment of a navy.
Various letters and testimonies by captured sailors described their time in captivity. Barbary Coast imprisonment was different from that practiced by the United States and the European powers of the time. Prisoners were able to obtain wealth and property, along with achieving status beyond that of a slave. One such example was James Leander Cathcart, who rose to the highest position a Christian slave could achieve in Algeria, becoming an adviser to the dey (governor). Even so, most captives could expect little more than lives of hard labor and abuse, and struggled under extremely poor conditions that exposed them to vermin and disease. As word of their treatment reached the United States, through freed captives' narratives and letters, Americans pushed for Congress to take military action against the Barbary states.
On 19 July 1794, Congress appropriated $800,000 (equivalent to $17 million in 2025) for the release of American prisoners and for a peace treaty with Algiers, Tunis, and Tripoli. On 5 September 1795, American negotiator Joseph Donaldson signed a peace treaty with the dey of Algiers that included an upfront payment of $642,500 in specie (silver coinage, equivalent to $12 million in 2025) for peace, the release of American captives, various expenses for their care, and various gifts for the dey's royal court and family. An additional indefinite yearly tribute of $21,600 (equivalent to $410,000 in 2025) in shipbuilding supplies and ammunition would be given to the dey. The treaty, designed to prevent further piracy, resulted in the release of 115 American sailors held captive by the dey.
Jefferson continued to argue for cessation of the tribute, with rising support from President George Washington and others. With the recommissioning of the United States Navy in 1794 and a rush of new ships and weapons, it became increasingly possible for America to cease payments, although the established habit was difficult to change. The continuing demand for tribute ultimately led to the formation of the United States Department of the Navy, founded in 1798 to prevent further attacks upon American shipping while resolving the issue of Barbary piracy. Federalist and Anti-Federalist forces argued over the needs of the country and the burden of taxation. Jefferson's own Democratic-Republicans and anti-navalists believed that the future of the country lay in westward expansion, arguing that the Atlantic trade threatened to siphon money and energy away from the nation while entangling it in the wars and intrigue of the Old World. During the divisive 1800 presidential election, Jefferson defeated incumbent president John Adams. Jefferson was poised to order naval actions against the Barbary states.
Declaration of war and naval blockade
Just before Jefferson's inauguration in March 1801, Congress passed naval legislation that, among other things, provided for six frigates that "shall be officered and manned as the President of the United States may direct." In the event of a declaration of war on the United States by the Barbary powers, these ships were to "protect our commerce and chastise their insolence—by sinking, burning or destroying their ships and vessels wherever you shall find them." On Jefferson's inauguration, Yusuf Karamanli, the Pasha (or Bashaw) of Tripoli, demanded $225,000 (equivalent to $4.4 million in 2025) from the United States. It was a long-standing tradition that if a government was changed or the consular was changed, said government would have to pay 'consular' gifts, in either gold or in goods, usually military and naval stores. (In 1800, federal revenues totaled a little over $10 million, equivalent to $190 million in 2025.) Finally able to put his long-held beliefs into practice, Jefferson refused the demand. Consequently—along with the Americans not paying the money nor the gifts as stated in the Treaty of Tripoli signed in 1796 between Tripoli and America— on 10 May 1801, Karamanli declared war on the United States, not through any formal written documents but in the customary Barbary manner of cutting down the flagstaff in front of the United States Consulate. Algiers and Tunis did not follow suit.