The correct answer to this open question is the following.
Although there are no options attached, we can answer the following.
I think this quote refers to the Panama Revolution of November 1903. Let's remember that United States President Theodore Roosevelt supported Panama to get its independence from Colombia.
The federal government had many economic and political interests in the region, specifically, it wanted the control of the Panama Canal that the French had started to construct at the end of the 1800s.
Roosevelt created the corollary of the Monroe doctrine in which the United States sent a clear message to European superpowers saying that it was only the United States the ones that were going to intervene in the foreign issues of Latin America. No more European nations.
