07 January 1975,
Naval miners started the lockdown. For two months, the company ' s management had interrupted the work and salary of some 2,000 workers, and 47 workers were able to enter the mines and began a protest. The Civil Guard prevented access to the others, so they conducted daily concentrations at the entrance of the mine. After a week, more than 200 workplaces in Navarre went on a solidary strike and two weeks later the workers ended the closure. Several workers were prosecuted, but the solidary flood broke the judgment.
Source:
Sabino Ormazabal, 500 nonviolent actions. Another way to tell the story (Bidea target group).