In 1937, he was summoned before the War Ministry and accused of ignoring a draft notice from the Italian Royal Navy—one day before he was to write a final examination on Italy's participation in the Spanish Civil War, based on a quote from Thucydides: "We have the singular merit of being brave to the utmost degree." Distracted and terrified by the draft accusation, he failed the exam—the first poor grade of his life—and was devastated. His father was able to keep him out of the Navy by enrolling him in the Fascist militia ("Milizia Volontaria per la Sicurezza Nazionale"). He remained a member through his first year of university, until passage of the Italian Racial Laws of 1938 forced his expulsion. Levi later recounted this series of events in the short story "Fra Diavolo on the Po".