How did temujin prove his military prowess

d . promote goodwill and protect weaker nations

Explanation:

Imperialism refers to the process by which a country subdues another country and places it under its control. This can be done by economic, military force or other means.

By the very nature of imperialism as described above, it is not done because it promotes the goodwill of other nations and neither is it for their protection because neither of these things are achieved by denying another nation its freedom. The U.S. therefore did not engage in imperialistic activities for these two reasons.