Puerto Rican citizenship
On March 2, 1917, the Jones–Shafroth Act was signed, collectively making Puerto Ricans United States citizens without rescinding their Puerto Rican citizenship. In 1922, the U.S. Supreme court in the case of "Balzac v. Porto Rico" ruled that the full protection and rights of the U.S constitution do not apply to residents of Puerto Rico until they come to reside in the United States proper. Luis Muñoz Rivera, who participated in the creation of the Jones-Shafroth Act, gave a speech in the U.S. House floor that argued in favor of Puerto Rican citizenship. He declared that "if the earth were to swallow the island, Puerto Ricans would prefer American citizenship to any citizenship in the world. But as long as the island existed, the residents preferred Puerto Rican citizenship." The Jones Act allowed locals to renounce the United States citizenship and remain exclusively Puerto Rican citizens, at the cost of being stripped of the right to vote. Despite these arbitrary limitations, 287 residents completed the process to forfeit the statutory recognition.
Puerto Rican women in the military
Spain ceded Puerto Rico to the United States in accordance with the agreement reached in the 1898 Treaty of Paris, which officially ended the Spanish–American War. On March 2, 1917, with the advent of World War I, U.S. citizenship was imposed upon Puerto Ricans as a result of the passage if the Jones–Shafroth Act (the Puerto Rican House of Delegates rejected US citizenship). Two months later, when Congress passed the Selective Service Act, conscription was extended to the island. Those who were eligible, with the exception of women, were expected to serve in the military. About 20,000 Puerto Rican men were drafted during World War I.