To fight the Spanish-American War. From 1899 until 1902 the United States fought against Spain to take control of Spain's colonies. Spain was defeated and the United States kept the control of Cuba, Puerto Rico and the Philippines which was a big loss for Spain but gave the U.S. a better control of the Caribbean and the Asian South-Eastern regions.
the scientific revolution lead to new machines and ways of doing things which would, in a way that is self-explanatory, lead to the industrial revolution.
