Which war was fought by the United States in the 1900s?

One of the prominent conflicts fought by the United States in the 1900s was World War I, which lasted from 1914 to 1918. Although the U.S. joined the war in 1917, it played a crucial role in tipping the scales towards an Allied victory. The war transformed the U.S. geopolitically and socially, setting the stage for its emergence as a global power. Another significant war was World War II, starting in 1939 and concluding in 1945. The U.S. initially stayed neutral until the attack on Pearl Harbor in 1941. This conflict not only reshaped global politics but also sparked major changes in industry, technology, and society within the U.S., paving the way for the post-war economic boom.