How did Puerto Rico become a US Territory
Since the Spanish-American War in 1898, the US has held Puerto Rico, which was formally given to it as a colony and territory in the Treaty of Paris in 1899. The relationship has gone through different stages, sometimes leading to tensions between the territory's leaders and the US government.
US Interests in Puerto Rico
United States interests in Puerto Rico, and the wider Caribbean for that matter, had increased to a high level by 1890, as the US emerged as a major naval power. By this time, there were interests to acquire Panama or another nearby country to create the Panama canal, while others in the US government had advocated for Caribbean bases such as Cuba and Puerto Rico. By 1894, the Naval War College had anticipated that war with Spain, which had controlled Puerto Rico and Cuba, would likely occur. Puerto Rico's valuable sugar crops were also of interest, particularly as the sugar industry was not developed within the US. On February 15, 1898, the USS Maine mysteriously sank, after having been dispatched to monitor events in Cuba which had revolted against Spain. This led the US to declare war and resulted in a relatively quick victory as the US had decisive naval power. On July 25, 1898, US forces landed near Guánica, Puerto Rico. To this day, this landing is commemorated as Constitution Day in Puerto Rico, which was previously called Occupation Day as the start of US presence on the island. After the US landing, military action continued until August 13, 1898, but the fighting was inconclusive for all sides. However, by this time, an armistice was signed and the US was left in control of the entire island on the agreements made in the Treaty of Paris that officially concluded the Spanish-American War.
US Territory
At the beginning of the 20th century, Puerto Rico was effectively ruled by a military governor appointed by the President. The Foraker Act in 1900 gave Puerto Rico limited ability to control its sovereignty by establishing a 35-member House of Representatives for the island. A judicial system was also established with one US non-voting representative assigned. The US could still appoint the governor and Upper House in the legislative system. The new Act did enable Puerto Rico to enact its own laws, but any of these laws could be overturned by the US government. In the early years after the US had been given Puerto Rico, there was a wide-spread independence movement, similar to Cuba and other former Spanish colonies. This continued after the US possession of the island and in 1914 the House of Representatives in Puerto Rico voted unanimously for independence from the US. However, the US government saw this vote as unconstitutional and a violation of the Foraker Act that had established the legislative parameters for Puerto Rico, rejecting the independence vote.
The results of the initial vote for independence from the US led to friction and hostility between government officials who were elected and those appointed to govern the island by the US President and government. In 1917, the Jones–Shafroth Act was enacted, which granted citizenship to Puerto Rico's citizens born after April 25, 1898. This led to further friction because it was seen as plot by the elected officials as an attempt to draft Puerto Rico's residents into World War I.