On the 26th of April, the day after the arrival of the expedition in sight of Derne, Eaton sent a flag of truce to the Bey, demanding in the name of Hamet as rightful Pasha of Tripoli, quiet passage through the place, and provisions for his troops; promising in case of compliance, that he should not be removed from his government. The Bey instantly sent back the flag, with this short but expressive answer--"_Your head or mine._" In the course of the night the Argus, the Hornet, and the schooner Nautilus appeared; and on the 27th, Eaton having succeeded with great difficulty in landing a field piece from the latter vessel, determined on an immediate attack, it being his object to gain possession of the town before the arrival of the troops which were daily expected from Tripoli. Accordingly he himself advanced with some of the Christians and Arabs down the valley, towards the entrance of the place; Lieutenant O'Bannon with six Americans and fifty other Christians took post to the eastward, and brought the cannon to bear on the Bey's quarters; Hamet with about a thousand Arabs occupied a ruined castle on the southwest side of the town. At two o'clock the vessels stood in as near as possible, and fired upon the battery and houses occupied by the Tripolines. By this means, and by the active use of O'Bannon's field piece, the battery was soon silenced, and the Bey's troops rushing from their coverts upon Eaton's little band, which had now reached the entrance of the place, succeeded in throwing them for a moment into confusion. They were however speedily rallied, and being joined by a few of O'Bannon's men, were brought to the charge; the Tripolines were driven through the town to their former posts, which they were however obliged immediately to abandon, the greater part seeking refuge on the seashore, where they were exposed to the fire from the vessels. The battery was seized by the Christians; and the guns, found loaded and primed, were turned on the houses occupied by the Bey and his few remaining followers. Hamet's troops had remained very quiet during the affair, which was conducted almost entirely by the Christians; when success had been assured, some of them entered the town, which they began to pillage, others pursued the fugitives. It is believed that they lost none of their number. The Christians had fourteen killed, and several wounded; among the latter was Eaton, who received a ball in his wrist on entering the town.