The Treaty of Paris of 1898 had a significant impact on the United States by marking its transition into a global power. With the acquisition of territories such as Puerto Rico, Guam, and the Philippines, the U.S. expanded its influence and territory beyond the continental borders. This change spurred debates about imperialism, governance, and the American identity, as the nation grappled with the responsibilities of managing overseas colonies. The treaty also set the stage for future U.S. involvement in international affairs and established a precedent for further territorial expansion, shaping American foreign policy in the 20th century.