Pedro Albizu Campos was the leader of the Nationalist Party of Puerto Rico from 1930 until his death in 1965. Turning the party into the premier force fighting for Puerto Rican independence, he sacrificed his liberty many times, even facing torture once in jail. Despite a law passed two years before that criminalized any expression of anti-U.S. sentiment, Don Pedro gave a fiery speech in Lares on September 23, 1950. This speech, the English version of which you can download below, fired up the people to the point of conducting an insurrection against U.S. colonialism the next month on October 30. This event in Puerto Rican history became known as the Nationalist Insurrection of 1950, some referring to it as the Jayuya Uprising because of the fact that it was in that town where the uprising was strongest and longest-lasting. Please read on this event further using Wikipedia and other sources you may be able to find in your search.