The document discusses United States imperialism in Japan and Cuba in the late 1800s. It explains that after gaining independence from Britain, the US resisted other countries' imperialism but then became imperialistic itself against Native Americans. In the mid-1800s, the US sought to expand by influencing Japan to open its ports through the use of force and threatening technology. It also expanded its control over Cuba through the Spanish-American war over issues like Spanish concentration camps and the sinking of the USS Maine, gaining Cuba and other territories as protectorates or territories.