This paper tries to analyze the development of discourse over the concept of Czechoslovakism, the official national narrative of the First Czechoslovak Republic. Within that frame, it focuses on the development of Slovak question during World War I. and the 1920ies. It will do so not only by trying to elaborate on the discussion on Slovak individuality within the national collective form a Czechoslovak perspective, but also will try to analyze the incorporation of "Hungarian" elements into the national narrative.