In 1939 he was Chief of Staff of the Truckborne Army Corps (Corpo d'Armata Autotrasportabile), and in July of the same year he was promoted to brigadier general.

Following the Soviet success in Operation Little Saturn, in January 1943 the Alpine Corps of which the "Tridentina" was part was forced to retreat through the steppe in order to avoid being encircled and destroyed.

[1][2][3][4][5] After his return to Italy, Reverberi was captured by German troops in Brixen on 8 September 1943, following the Armistice of Cassibile, and interned in a POW camp in Posen.

By declaring that he wanted to join the Italian Social Republic, he obtained to be released and sent to Vittel, France, for training; once there, however, he soon made contact with the French Resistance.

[1][2][3][4][5] After leaving the Army, Reverberi became managing director of a soap and cosmetics company, and a leading figure of the National Alpini Association.