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 migration to New York City
In 1917, the United States entered World War I and that same year the United States Congress approved the Jones-Shafroth Act which gave Puerto Ricans U.S. citizenship. Puerto Ricans no longer needed a passport to travel to the U.S. and were allowed to seek public office in the mainland U.S. The economic situation in the island was bad and continued to worsen as a result of the many hurricanes which destroyed most of its crops. Many Puerto Rican families migrated to the United States, the bulk of whom went to New York, in search of a better way of life. In New York, they faced the same hardships and discrimination that earlier groups of immigrants, such as the Irish, the Italians, and the Jews, had faced before them. It was difficult for them to find well paying jobs because of the language barrier and their lack of technical working skills. The few men who found jobs worked for low salaries in factories. The women usually stayed home as housewives and tended to their children. Those who did not find jobs had the option of joining the United States Military. Prior to the Jones-Shafroth Act, Puerto Ricans in the mainland United States as all other non-citizens, who were permanent residents were required to register with the Selective Service System by law and could be drafted, however one of the effects of the Act was that all Puerto Ricans were now eligible for the military "draft" (conscription). One of the military units at that time was New York's U.S. 369th Infantry Regiment. Rafael Hernández was a Puerto Rican who served in the almost all Afro-American unit. The unit fought against the Germans in France and became known as the "Harlem Hell Fighters". Hernández, his brother Jesus and 16 other Puerto Ricans was assigned to the United States Army's Harlem Hell fighters musical band, the Orchestra Europe.
Nero Chen was one of the many Puerto Ricans who settled in East Harlem. He became the first Puerto Rican boxer to gain acclaim when in 1917 he fought against "Panama Joe Gans" at Harlem's Palace Casino which was located at 28 East 135th St., between Fifth and Madison Avenues, in Manhattan. As evidenced by an early 1924 poster, migrants in New York organized baseball teams which played against each other. The poster announces a game which was held at Howard Field in Brooklyn between two teams, the San Juan B.B.C. and the Porto Rican Stars, made of Puerto Ricans from the East Side section of Manhattan.