First of May Group

The First of May Group was an anarchist anti-Franco resistance movement which took militant action against Francoist Spain. They were formed in 1966 by Spanish exiles including Iberian Federation of Libertarian Youth (FIJL) members in France, dissatisfied with what they perceived as the quietism of other opposition groups. Actions attributed to the group include the kidnapping of diplomat and priest Monsignor Marcos Ussia, occupation of the Vatican Embassy in 1966 and the machine-gunning of the Spanish embassy in London. A man claiming to speak for the group stated that they were behind the March 1974 bombing of the Spanish Cultural Institute in Dublin. In 1980 the book ''Towards a citizens militia: anarchist alternatives to NATO and the Warsaw pact'' was written by 'International Revolutionary Solidarity Movement (First of May Group) and published by Cienfuegos Press.

In Greece a group of a similar name but without any relation also appeared in 1989, mostly known for killing Supreme Court Prosecutor Anastasios Vernardos. Provided by Wikipedia