“Concerning the disorders in Barcelona, Franco has told me that the street fighting was provoked by his agents. Nicholas Franco has confirmed this report, informing me that they have a total of 13 agents in Barcelona. Some time ago one of them had reported that the tension between Anarchists and Communists in Barcelona was so great that it could well end in street fighting. The Generalissimo told me that at first he doubted this agent’s reports, but later they were confirmed by other agents. Ordinarily he didn’t intend to take advantage of the possibility until military operations had been established in Catalonia. But since the Reds had recently attacked Teruel to aid the Government of Euzcadi (the Basque provinces), he thought the time was right for the outbreak of disorders in Barcelona. In fact, a few days after he had received the order, the agent in question with three or four of this men, succeeded in provoking shooting in the streets which later led to the desired results.”
– German Ambassador to Franco’s Spain Wilhelm von Faupel in a communique to Berchtesgaden dated May 11, 1937, quoted in Progressive Labor, Volume 9, page 113.