Final answer:
The United States gained global power and built an empire by winning the Spanish-American War and acquiring territories, using its economic strength to influence foreign markets, and embracing the Industrial Revolution to expand its influence globally.
Step-by-step explanation:
Throughout its history, the United States engaged in several key activities that contributed to its rise as a global power and the establishment of an empire. Firstly, the victory in the Spanish-American War allowed the U.S. to gain territories in the Caribbean and the Pacific, marking the country's first major step towards empire-building.
The acquisition of former Spanish colonies, such as Guam, Puerto Rico, and the Philippines, demonstrated the U.S. military's growing prowess and sent a strong message to other global powers.
Secondly, the United States leveraged its industrial and economic clout to create spheres of influence, notably in China with the promotion of the 'open door' policy. This not only opened new markets to American goods but also established the U.S. as an economic powerhouse that could compete with European nations aspiring to build their own empires.
Lastly, American businesses sought overseas resources and markets, spurred by the Industrial Revolution. This resulted in pushing for more aggressive foreign policies and the expansion of American influence around the world. Influential thinkers like Alfred Mahan advocated for a stronger navy to protect American interests and facilitate trade, which had significant implications for America's role on the global stage.