German–Soviet Border and Commercial Agreement

The German–Soviet Border and Commercial Agreement, signed on January 10, 1941, was a broad agreement which settled border disputes, and continued raw materials and war machine trade between the Soviet Union and Nazi Germany. The agreement continued the countries' relationship that started in 1939 with the Molotov–Ribbentrop Pact, which contained secret protocols that divided Eastern Europe between the Soviet Union and Germany.

Source: Wikipedia — German–Soviet Border and Commercial Agreement (CC BY-SA 4.0)