Ports were plenty active - that is precisely what the navies were so occupied with and that induced its own demands for support as well. Viewing it as a lasting

Ports were plenty active - that is precisely what the navies were so occupied with and that induced its own demands for support as well. Viewing it as a lasting trade isolation would be inaccurate - Japan and Germany were allies but they did not share the same battlefields even though both fought against the US and USSR. Single town level can support at very best a rough age of sale technology level and even then almost certainly no bronze.