Final answer:
The 1890s marked the beginning of the U.S. transformation into an international power, driven by the Spanish-American War and the acquisition of overseas territories.
Step-by-step explanation:
The 1890s was a turning point in American foreign policy history primarily because the United States shifted from a policy of isolationism to becoming a major player in international affairs.
This dramatic shift was marked by involvement in the Spanish-American War and the acquisition of new territories, such as Puerto Rico, Guam, and the Philippines, signaling the start of American imperialism.
This period saw the United States emerge as a significant force in international politics, a trend that continued into the twentieth century.
The 1890s marked a turning point in American foreign policy history because the United States shifted from a policy of isolationism to becoming a major player in international affairs. This shift is marked by its involvement in the Spanish-American War and the acquisition of new territories, such as Hawaii and the Philippines.
The United States went from a nation focused on its own development and avoiding conflicts outside the Western Hemisphere to actively intervening in global affairs and establishing a presence on the world stage.