The organization of a provisional army was now at once begun. Washington accepted the chief command on condition that Hamilton should have the second place. There were already a few vessels in the navy. A Navy Department was now organized. The building of more warships was begun, and merchant vessels were bought and converted into cruisers. French privateers sailed along the American coasts and captured American vessels off the entrances of the principal harbors. But this did not last long. For the American warships drove the privateers to the West Indies and pursued them as they fled southward. Soon the American cruisers began to capture French men-of-war. Captain Truxton, in the Constellation, captured the French frigate L'Insurgent. Many other French vessels were captured, and preparations were made to carry on the naval war even more vigorously when a treaty with France was signed.