What significant events and actions contributed to the United States emerging as a world power?

The annexation of Hawaii and the Spanish-American War are pivotal events that showcase the transition of the United States into a world power in the late 19th and early 20th centuries. The annexation of Hawaii in 1898 allowed the U.S. to establish a strategic naval base at Pearl Harbor, enhancing military presence in the Pacific and facilitating American economic interests in Asia. This strategic move was instrumental in extending American influence across the Pacific Ocean.

The Spanish-American War, fought in 1898, was a significant conflict that marked the U.S.’s emergence on the global stage. The war resulted in the defeat of Spain and the acquisition of territories such as Puerto Rico, Guam, and the Philippines. This expansion not only showcased military strength but also reflected America's growing role in international affairs, particularly in the Caribbean and Asia. By the end of the war, the U.S. had positioned itself as a dominant power, capable of influencing events beyond its borders and leading to greater involvement in international politics.

In contrast, other options do not fully encapsulate the critical early steps that led to the U.S. becoming a world power. While World War I and the establishment of the United Nations were important for shaping the international order and enhancing U.S.