This paper analyzes Giovanni Comisso’s novel Il delitto di Fausto Diamante (1933), which explores the turbulent journey of an Italian World War I veteran struggling to adapt to civilian life under the fascist regime, through the framework of militarized masculinity. By tracing the protagonist’s downward spiral into unemployment, poverty, and ultimately homicide, the novel reveals the fragmented and incomplete process of “unmaking” militarized masculinity, showing how this profoundly shaped veterans’ family dynamics and social relationships.