The Puerto Rican Nationalist Party insurgency was a series of coordinated insurrections for the secession of Puerto Rico led by the president of the Puerto Rican Nationalist Party, Don Pedro Albizu Campos, against the United States government's rule over the islands of Puerto Rico. The party repudiated the "Free Associated State" status that had been enacted in 1950 and which the Nationalists considered a continuation of colonialism.

Law 53 of 1948 better known as the Gag Law, was an act enacted by the Puerto Rico legislature of 1948, with the purpose of suppressing the independence movement in Puerto Rico. The act made it a crime to own or display a Puerto Rican flag, to sing a patriotic tune, to speak or write of independence, or to meet with anyone or hold any assembly in favor of Puerto Rican independence. It was passed by a legislature that was overwhelmingly dominated by members of the Popular Democratic Party (PPD), which supported developing an alternative political status for the island. The bill was signed into law on June 10, 1948 by Jesús T. Piñero, the United States-appointed governor. Opponents tried but failed to have the law declared unconstitutional by the United States Supreme Court.