Do you think that the U. S. becomes more powerful and dominant after imperializing these nations?

Do you think that is a good thing? Explain your
thinking.

In the late nineteenth century, the United States abandoned its century-long commitment to isolationism and became an imperial power. ... Both a desire for new markets for its industrial products and a belief in the racial and cultural superiority of Americans motivated the United States' imperial mission.

what are the others?

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories