The Treaty of Paris, signed in 1898, established peace between the United States and Spain, concluding the Spanish-American War. The treaty marked a significant turning point in U.S. foreign policy, as it resulted in the U.S. acquiring territories including Puerto Rico, Guam, and the Philippines. This territorial expansion signaled a shift towards imperialism, as the United States emerged as a global power with overseas possessions. The treaty also reflected the declining influence of Spain as a colonial empire and the increasing position of the United States in international affairs, setting the stage for future involvement in global politics and conflicts.