How did Europe and the United States respond to the Japanese invasion and massacre of Manchuria in 1931?

Both the United States and Europe did nor support the actions of Japan, they made it clear that they did not recognize any agreement Japan must have entered that resulted to the Invasion of Manchuria.

Explanation:

In response to Japan's invasion of Manchuria in 1931, the United States and Europe publicly explained that both their government did not agree with The actions of Japan

The U. S. Secretary of War, Henry Stimson, made a moral statement about Japan's invasion of Manchuria in 1931. The statement stated that the United States refused to or "recognize any agreement, or situation" that Japan may have been involved in due to the invasion.

With the invasion attracting the great international attention, the League of Nations presented the Lytton Commission, British politician Victor Bulwer-Lytton who was in charge at the time, was to analyse the situation, with the organization making its findings in October 1932.