Postwar Naples black markets outlasted those elsewhere in Italy.

Evidence

An entire contraband system for food, clothing, cigarettes, appliances, and other goods took root in Naples, despite largely disappearing elsewhere in Italy after the war. It became so efficient that penicillin and other medical supplies were readily available there even when there were shortages in military hospitals. — David Vine, Base Nation_ How U.S. Military Bases…, 335

Categorization

• SHARE: The detail that black-market penicillin outmatched military hospitals in Naples is one a military-history friend would savor.
• corroborated: 2 independent passages support this claim — David Vine, Base Nation_ How U.S. Military Bases…, 335