When was it obvious that the USA was emerging as a superpower?

The United States emer ged as a super power in the late 1 9 th and early 2 0 th centuries , as a result of its economic , military , and political domin ance in the world . There were several key events and develop ments that contributed to this emer gence : \n \n 1 . Indust rial Revolution : The United States experienced a rapid industrial ization during the late 1 9 th century , which allowed it to produce goods on a large scale and become a major economic power . \n 2 . Spanish - American War : The Spanish - American War of 1 8 9 8 marked the beginning of the United States ' emer gence as a major military power . The United States defeated Spain and gained control of Puerto Rico , Gu am , and the Philippines . \n 3 . World War I : The United States entered World War I in 1 9 1 7 , after initially remaining neutral . The war helped the United States to develop its military and industrial capabilities , and it emer ged as a major player in the post - war world . \n 4 . Inter war period : During the inter war period , the United States continued to strength en its economy and military , and it became the world ' s largest cred itor nation . \n 5 . World War II : The United States played a major role in World War II , both as a military power and as a leader of the Al lied powers . The war helped to solid ify the United States ' position as a super power . \n \n Over all , it was clear that the United States was emer ging as a super power by the end of World War II , as it had become a dominant economic , military , and political power in the world . </s>