On February 5, 1842 the Wilkes treaty was signed at Soung, Island of Sulu. This treaty is the first written understanding between the government of the United States of America and the Philippines through the Sultanate of Sulu.
The Wilkes treaty of 1842
Copy of the Wilkes treaty of 1842 courtesy of Dr. H. Otley Beyer — Walter Johnson Robb (Click on image to enlarge).
Sri Paduka Maulana Al Sultan Mahomed Jamal Al Alam Bin (son of) Al Marhon Sri Paduka Al Sultan Mahomed Fathlon, Sultan of Sulu signed in behalf of the Sultanate, and Charles Wilkes commander of the American expedition, for the United States of America.