Citrine's battles with the Communist International (Comintern) and its British agents began after the 1926 general strike. The Communist Party of Great Britain (CPGB) and its front group in the unions, the Red International of Labour Unions (RILU), later the Minority Movement, blamed the TUC leadership for the defeat of the strike and attacked them viciously. In a fully-researched pamphlet, Citrine exposed that attempt by the Comintern to subvert the leaders of the British trade unions and helped to isolate British communists in the trade unions and the Labour Party.