Final answer:
The United States experienced significant economic growth and became a global leader following WWI, while also undergoing social and cultural changes. However, it did not gain new territories or expand its military significantly as a direct consequence of the war.
Step-by-step explanation:
The impact of World War I (WWI) on the United States was profound, altering its position in the world and bringing about significant internal changes. Firstly, there was substantial economic growth as the U.S. supplied the Allies with munitions and goods, leading to technological advancements in various industries. Secondly, the U.S. took a leap towards becoming a global leader, as illustrated by the creation of the League of Nations, despite the later decision to remain isolationist. On the domestic front, the war effort resulted in social changes, including a shift in gender roles as women took on work traditionally done by men, and cultural developments that reflected the complexities of the post-war period.
However, it's important to note that the U.S. did not expand militarily or acquire new territories as a direct result of WWI. Instead, the war's conclusion mostly saw the redrawing of European borders. The Treaty of Versailles and the economic turmoil it imposed on countries like Germany laid the groundwork for future conflict, arguably a stark lesson on the limitations of punitive peace terms.