HomePeace Status Lists ...1. Four-Power Treaty Concerning Insular Possessions and Insular Dominions in the Region of the Pacific Ocean, with Declaration, done at Washington December 13, 1921 hide 1. Four-Power Treaty Concerning Insular Possessions and Insular Dominions in the Region of the Pacific Ocean, with Declaration, done at Washington December 13, 1921 Depositary – Treaty Affairs Office of Treaty Affairs Entered into force August 17, 1923, on the deposit of instrument of ratification. Download Status List [102 KB] Tags Multilateral Peace Treaties