These were Cuba--in view of its "duty toward the United States," Panama, Guatemala, Brazil, Honduras, Nicaragua, and Costa Rica.
Since the Dominican Republic at the time was under American military control, it was not in a position to choose its course.

Four countries Ecuador, Peru, Bolivia, and Uruguay--broke off diplomatic relations with Germany.

The other seven republics--Mexico, Salvador, Colombia, Venezuela, Chile, Argentina, and Paraguay--continued their formal neutrality.

In spite of a disclosure made by the United States of insulting and threatening utterances on the part of the German charge d'affaires in Argentina, which led to popular outbreaks at the capital and induced the national Congress to declare in favor of a severance of diplomatic relations with that functionary's Government, the President of the republic stood firm in his resolution to maintain neutrality.
If Pan-Americanism had ever involved the idea of political cooperation among the nations of the New World, it broke down just when it might have served the greatest of purposes.

Even the "A B C" combination itself had apparently been shattered.
A century and more had now passed since the Spanish and Portuguese peoples of the New World had achieved their independence.