*1855/1/21 (March 9) The [[Treaty of Amity (Ryukyu-US)|Ryûkyû-USA Treaty of Amity]] is ratified by the US Congress and officially announced by President Franklin Pierce. | *1855/1/21 (March 9) The [[Treaty of Amity (Ryukyu-US)|Ryûkyû-USA Treaty of Amity]] is ratified by the US Congress and officially announced by President Franklin Pierce. |