Sentence:  Those already wary of the party's electoral maneuvers in 1919 further resented the Socialists' calls, after the May 1920 strike failure, to abandon revolutionary <WSD>insurrectionalism</WSD> and place all hopes in "le bulletin rouge". 
Meaning of the word marked with <WSD> tags:  The belief that insurrection is the best way to achieve a communist or socialist revolution.