The First Barbary War (1801-1805) was a conflict between the United States and the North African states known as the Barbary States, primarily Tripoli, Tunis, and Algiers. The war arose from issues related to piracy and the demand for tribute by these states, which targeted American merchant ships in the Mediterranean Sea. The U.S. aimed to protect its shipping interests and assert its naval power. President Thomas Jefferson played a crucial role in initiating the war, as he opposed paying tribute to the Barbary pirates. The conflict involved naval battles and the deployment of U.S. Marines, leading to significant engagements, including the famous raid on the port of Tripoli. The war ultimately ended with a treaty that reduced the tribute payments and established a precedent for U.S. military intervention in foreign conflicts.