17. Cooperation Over Long Distances

In December, 1941, an amendment to the Tripartite Pact between Germany, Italy, and Japan was added to include a military agreement between the Axis partners. Part of the amendment sought to establish trade routes to exchange vital supplies, plus technological expertise and technical experts. By then, Germany had invaded the Soviet Union, so land trade and exchange between Japan and her European partners via the USSR was no longer an option. So the amendment called for exchanges via aerial and sea routes. The era’s airplanes could not reliably handle aerial routes that avoided Soviet airspace, so trade and exchange via sea was the only option left.



