The Treaty of Cession of Tutuila, also known as the Deed of Cession of Tutuila, was a treaty between several chiefs of the island of
Tutuila and the United States signed on April 17, 1900, whereby the chiefs swore allegiance to, and ceded the island of Tutuila to, the United States, which now forms part of
American Samoa. It came about because of the
Second Samoan Civil War and the
Tripartite Convention of 1899 between the United States, the United Kingdom, and the German Empire. It was ratified by the
United States Congress by the
Ratification Act of 1929.