The following May, after a torpedo attack on the steamship Sussex, the President scored a major diplomatic victory by forcing the Germans to agree not to target passenger ships nor to attack merchant vessels without warning.

第二年五月， 在苏塞克斯号轮船遭到鱼雷袭击后，总统迫使德国同意不以客船为目标， 也不在没有警告的情况下攻击商船， 从而取得了重大外交胜利。