December 13, 1921 (yau years 15th winter months), the four countries signed a naval treaty in Washington.

1921 12 13, 2009, Washington meeting ended in victory, the United States, Great Britain, France and Japan signed the Treaty Pacific. The four countries agreed to respect each other on the basis of the guidelines of the International Union respective ownership in the Pacific. (History www.TodayOnHistory.com)
four-nation treaty the United States to enjoy the privileges of the League of Nations in the Pacific, although it refused to become a member of the world organization. United States on the other three countries share some Pacific trade activities, he will also be able to use the Yap Islands by Japan under the jurisdiction of the important telegraph lines and call centers. (History TodayOnHistory.com)