Hello from Italy! I confirm that Hemingway was decorated with a silver medal for valor ("Medaglia d'argento al Valor Militare - MAVM) and here the reason:
" HEMINGWAY Ernest Miller, from Illinois Park (Chicago), American Red Cross lieutenant - Officer of the American Red Cross, charged with bringing comfort items to the Italian troops engaged in combat, gave proof of courage and self-denial. Struck by numerous fragments of enemy bombards, with admirable spirit of brotherhood, before being treated, he gave generous assistance to the most severely injured Italian soldiers from the same blast