With what i dont understand
The primary mission of the United Nations is to help different countries, such as the United States, unite and maintain world peace. Also at the United Nations, country leaders address world issues such as climate change.
Answer: The United States emerged as a world power; Cuba gained independence from Spain; the United States gained possession of the Philippines, Guam, and Puerto Rico.
This is an opinionated question, so points should not be affected toward your opinon. However, I believe corporations should not have loyalty to the United States because the U.S. could ban businesses from selling/sharing a product to certain countries, however I think the U.S. government should have some say in what corporations sell to other countries so that they aren't giving some random person in "who knows where" parts to make a bomb etc...
It began a decade long boom.
This was known as the Roaring Twenties :)