How had the US replaced Spain as a colonial power?

The United States replaced Spain as a colonial power primarily through the outcomes of the Spanish-American War in 1898, which resulted in Spain ceding Puerto Rico, Guam, and the Philippines to the U.S. Additionally, the war marked a turning point as the U.S. emerged as a global power, driven by economic interests and a desire to expand its influence. This shift was further solidified by policies like the Open Door Policy in China and the establishment of protectorates in Cuba and the Philippines, indicating a broader imperial strategy. Ultimately, the U.S. adopted a more expansionist approach, establishing itself as a key player in global affairs.