File:Santiago Carrillo 003.jpg|alt=portrait from the chest upwards of man giving speech, a large crowd slightly out of focus is behind him|thumb|233x233px|Santiago Carrillo, General Secretary of the PCE, who urged mass peaceful protests in response to the Atocha massacre. "The ultra far right feels that it is irreversibly losing control of the state. So it is trying to create a climate of anarchy [and] ... terror in order to provoke a reaction from the army and the police against the democratization process."Following Franco's death in November 1975, Spain witnessed a period of significant political instability and violence. Ultra right-wing elements of the armed forces and high-ranking officials from the Franco regime, known as the
Búnker, were to varying degrees engaged in a
strategy of tension designed to reverse Spain's transition to constitutional democracy. The open emergence of independent labor unions in 1976, although still illegal, and an explosion in demands for improvements in working conditions and political reform, led to an upsurge in industrial strife across the country. In 1976, 110 million working days were lost to strikes compared to 10.4 million in 1975. This undermined the power bases of former regime officials, their business allies and those from the Francoist labor organization (
Sindicato Vertical). On the same day, the far-left organization
GRAPO kidnapped the President of the Supreme Council of Military Justice, Emilio Villaescusa Quilis.In the days immediately after the massacre, calls for stop work protests were heeded by upwards of half a million workers across Spain. The strikes were largest in the
Basque Country,
Asturias,
Catalonia and Madrid, with universities and courts across the country shut down in protest. The PCE was legalized soon after on 9 April 1977; the Party's earlier embrace of
Eurocommunism (essentially a rejection of Soviet-style socialism) and a highly visible role in promoting a peaceful response to the massacre allowed the government the necessary political space to lift the ban in place since 1939. With the passing of Act 19 covering labor rights on 1 April and the ratification of the
ILO Conventions on
freedom of association and
collective bargaining on 20 April, independent unions became legal and the Francoist
Sindicato Vertical system was effectively dissolved. ==Capture, trial, prison and escape==