Why and How did the US acquire Puerto Rico?
On July 25, 1898, during the Spanish-American War, Puerto Rico was invaded by the United States with a landing at Guánica. As an outcome of the war, Spain ceded Puerto Rico, along with Cuba, the Philippines, and Guam to the U.S. under the Treaty of Paris, for $20,000,000. By 1899, freedom of assembly, speech, press, and religion were decreed and an eight-hour day for government employees was established. A public school system is started and the U.S. Postal service is extended to the Island. The highway system was enlarged, and bridges over the more important rivers were constructed. The government lottery was abolished, cockfighting was forbidden, and a beginning was made toward the establishment of a centralized public health service.
