In July 1920, the Chilean state initiated its campaign of political repression against the IWW. On 19 July, the printer
Julio Valiente was arrested, charged with having published the statutes of the IWW; he admitted to having printed 3,000 copies for the union, although he denied having any affiliation to it. The police detained him indefinitely, under suspicion of carrying out subversive activities for the IWW. The following evening, police arrested the founder of the IWW's Valparaíso branch, the dockworkers' union leader
Juan Onofre Chamorro. On 21 July, they raided the IWW social center in Valparaíso, during which they beat and arrested 175 workers. After clearing the hall, the police planted
false evidence of explosives, guns and ammunition in the hall. The Chilean government swiftly appointed
José Astorquiza Líbano as
special prosecutor and granted him broad powers to investigate the case. Supplied with police reports and copies of IWW publications, Astorquiza ordered the arrest of all known IWW members in Santiago. On the morning of Sunday, 25 July 1920, five Chilean police agents broke into the Santiago offices of the IWW in order to gather evidence of subversive activities. Although they hoped to find weapons, their haul consisted solely of photos of famous anarchists, editions of various syndicalist publications, copies of manifestoes and other archival documents. Meanwhile, other police agents began their round up of suspected IWW members, including carpenters, shoemakers, drivers and students.
Verba Roja editor
Armando Triviño said he could "smell" the coming repression and fled the city to a safe house in Valparaíso; in his absence, his wife and co-editor were arrested. During the repression, some IWW-C members hid out at the home of
Casimiro Barrios Fernández. The police never found the large cache of weapons they assumed the IWW had; only three pistols and a single rifle, each possessed by individuals, were found during the entire wave of mass arrests. In the homes of most IWW members, including that of the poet
José Domingo Gómez Rojas, the police found little to no evidence of subversive activities, mostly discovering books, magazines or fundraising leaflets. Astorquiza subsequently turned to identifying the source of these various publications; he suspected the
University of Chile Student Federation (FECh) of publishing and distributing the IWW's programs. Two leading members of the FECh,
Santiago Labarca and
Juan Gandulfo, were known to have links to the IWW and went into hiding to avoid arrest. Based on
hearsay that the FECh and IWW were complicit in a student's death, Astorquiza ordered the arrest of all leading members of the FECh. As arrests of FECh members and raids against their premises began, the FECh issued a manifesto opposing the state's attacks against "
freedom of thought" and declared a strike. The IWW-C, which supported the student movement, called a 48-hour general strike in solidarity with the FECh. From 25 to 27 July, striking students and workers clashed with the police in Santiago. Men and women were arrested for throwing stones at police, impeding traffic and even waving the red flag. People called for the fall of the Sanfuentes government, some proclaimed their support for the liberal presidential candidate
Arturo Alessandri, and others were arrested for making pronouncements against the army and police. The Chilean public widely saw the events as a state attack against
freedom of speech. During the events that became known as the "process of the subversives" (), hundreds of men were arrested on suspicion of membership in the IWW; in contrast, only 3 women were arrested, including
María Astorga Navarro and
Carmen Serrano. The gender imbalance in the detentions was due in part to the fact that members of the IWW-C were largely male, many of whom saw women as "wives and mothers" rather than as fellow workers, but also due to the institutional
sexism of the Chilean authorities. So many people were arrested during the process that the jails of Santiago became
overcrowded, a situation exacerbated by Astorquiza spending so much time seeking evidence of subversive activities. Astorquiza considered even the most minor evidence, from possession of copies of left-wing papers to claims of people holding meetings, to be proof of subversive activities. He also ordered investigators to look into whether arrested people were involved in strikes. In order to cope with the overcrowding, the state transferred many detainees to prisons. By the middle of August 1920, Astorquiza was being forced to defend the mass arrests. Other state officials resigned after people, including the IWW poet Gómez Rojas, were discovered to have been imprisoned without charge. Imprisoned workers lived in extremely poor conditions: bad quality food; the spread of
epidemic typhus and
tuberculosis; and widespread
sexual assault. The poor conditions, combined with
solitary confinement and persistent abuse from the prison guards, caused the poet José Domingo Gómez Rojas to fall gravely ill. On 29 September 1920, he died in prison from his illness. Members of the IWW-C clandestinely attended his funeral, while others that were imprisoned sent flowers to decorate his coffin or raised funds to aid his bereaved family. The death of Gómez Rojas radicalized public opinion against the authorities. Astorquiza, the prison guards and police were widely blamed for the death, with students and the press increasingly protesting against the continued imprisonment of "innocent victims" of the process. By December 1920, all of the detainees that had been accused of sedition and illicit association were released from prison. The liberal opposition candidate Arturo Alessandri, who had won the
1920 Chilean presidential election, prepared to take office and was keen to put the process to an end. Despite the sustained repression, members of the IWW-C immediately returned to organizing after they were released from prison. In 1923, the anarchist surgeon Juan Gandulfo established an IWW medical clinic in Valparaíso, known as the Policlínica Obrera, which survived until the 1950s. After Gandulfo's death in 1931, his brother Pedro, a dentist, took over management of the clinic. ==International relations==