The treaty that offically ended the Russo-Japanesse War. The treaty was organized by Theodore Roosevelt and was signed in Portsmouth, Massachusetts. The treaty dictated that Japan gets Korea and that Russia and Japan have joint-rule in Manchuria. | The treaty that offically ended the Russo-Japanesse War. The treaty was organized by Theodore Roosevelt and was signed in Portsmouth, Massachusetts. The treaty dictated that Japan gets Korea and that Russia and Japan have joint-rule in Manchuria. |