Abstract: The object of this research is the participation of the soldiers and officers of Czechoslovak Corps on the Volga front of the Russian Civil War reflected in the documentary novel by F. Langer. The goal of this work consists in the analysis of evolution of the relations of Czechoslovak legionnaires on the Russian events in the context of the large-scale socioeconomic crisis. The research is based on the novel by F. Langer, which was written in 1920 but became available for scholarly reflection almost a century later. This novel introduces new records on the events of 1918 in Kazan, which became a turning point in the battle for the Volga Region, and allows revising the chronology of protest moods within the Czechoslovak Corps. The most well-known manifestation of the refusal from participation in combat operations is the actions of the personnel of the 1st regiment of the corps under the command of the Colonel Y. Shvets, who committed suicide in the late autumn of 1918. This fact is regarded as most striking manifestation of demoralization of the military personnel; however, these symptoms could be traced in September if referred to the text of F. Langer’s chronicles, which has not previously become the subject of scientific analysis. The documentary novel expand the boundaries of protest moods in the soldier environment; it forms a solid representation on the intrapersonal conflict among the participants of the events back in the early September of 1918, which adds more details on the motivation of the participants of combat operations. The conclusion is made that the Czechoslovak Corps, solving virtually pointless battlefield tasks, not only suffered heavy losses, but also lost the meaning of its actions in general. The work of F. Langer indicates the first protest moods among the soldiers in the early autumn of 1918.