Presley O'Bannon (c. 1776 – September 12, 1850) was a first lieutenant in the United States Marine Corps, famous for his exploits in the First Barbary War. In recognition of his bravery, he was presented a sword for his part in attempting to restore Prince Hamet Karamanli to his throne as the bey of Tripoli. This sword became the model for the Mameluke sword, adopted in 1825 for Marine Corps officers, which is part of the formal uniform today.
https://en.wikipedia.org/wiki/Presley_O%27Bannon
"Following a 600-mile trek across the Egyptian and Libyan deserts, Marine Lieutenant Presley O’Bannon, under the command of William Eaton, led his men in an attack on Derne to restore a friendly ruler to the throne of Tripoli. The Marines took the city, planting the American flag on foreign soil for the first time in history."