The Western Powers-or to be more specific, the signatories of the Nine Powers Treaty (the US, UK, France, Italy, Netherlands, Belgium, Portugal, and of course China and Japan) held a Nine Powers Conference in an attempt to pressure Japan into coming to some sort of an agreement. However, Japan did not show up, and due to other foreign policy concerns in Europe (re: a certain Hitler) as well as isolationist tendencies at home in the US, nobody was willing to commit to a direct intervention that would almost assuredly antagonize the Japanese.