The First of May Group was an anarchist

Anarchism

Anarchism is generally defined as the political philosophy which holds the state to be undesirable, unnecessary, and harmful, or alternatively as opposing authority in the conduct of human relations...

 anti-Franco

Francisco Franco

Francisco Franco y Bahamonde was a Spanish general, dictator and head of state of Spain from October 1936 , and de facto regent of the nominally restored Kingdom of Spain from 1947 until his death in November, 1975...

 resistance movement which took militant action against the Spanish

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 dictator's regime. Formed in 1966 by exiles dissatisfied with what they perceived as the quietism of other opposition groups, actions attributed to the group include the occupation of the Vatican Embassy in 1966 and the machine-gunning of the Spanish embassy in London.

The group, though secret, was thought to have links to the CNT

Confederación Nacional del Trabajo

The Confederación Nacional del Trabajo is a Spanish confederation of anarcho-syndicalist labor unions affiliated with the International Workers Association . When working with the latter group it is also known as CNT-AIT...

, the FIJL and the Anarchist Black Cross

Anarchist Black Cross

The Anarchist Black Cross is an anarchist politics support organization. The group is notable for its efforts at providing prisoners with political literature, but it also organises material and legal support for class struggle prisoners worldwide...

.