By May 1937 things had reached a point at which some kind of violent outbreak could be regarded as inevitable. The immediate cause of friction was the Government’s order to surrender all private weapons, coinciding with the decision to build up a heavily-armed ’non-political’ police-force from which trade union members were to be excluded. The meaning of this was obvious to everyone; and it was also obvious that the next move would be the taking over of some of the key industries controlled by the C.N.T.