Which war is considered a turning point that marked the United States becoming a world power?

The Spanish-American War is seen as a significant turning point for the United States in its emergence as a world power for several reasons. This conflict occurred in 1898 and was relatively brief, lasting only a few months. The war resulted in a decisive victory for the United States and led to the acquisition of several territories, including Puerto Rico, Guam, and the Philippines.

This expansion marked a shift in U.S. foreign policy from isolationism to a more interventionist approach, where the United States began to assert its influence beyond its continental borders. The outcome of the war also demonstrated the modernization of the U.S. military and highlighted America's growing naval power, emphasizing its capability to project military strength globally.

Moreover, the war significantly impacted American imperialistic ambitions and fostered a sense of national pride and identity, further reinforcing the United States' status as a burgeoning global power. In the following decades, the U.S. continued to expand its influence on the international stage, participating in world affairs more prominently than before.