by the Molotov–Ribbentrop Pact, followed by co-ordination with German forces in Poland. Three Baltic States described by the Molotov–Ribbentrop Pact, Estonia, Latvia, and Lithuania, were given no choice but to sign a so-called Pact of defense and mutual assistance which permitted the Soviet Union to station troops in them. Talks to expand the economic pact German raw materials crisis and Soviet needs after Poland Hitler's pressing for a German invasion of Poland in 1939 placed tremendous strain on the German war machine, which had been gradually gearing up after the Treaty of Versailles restrictions for "total war" ("totaler Krieg") in 1942 or 1943. The German navy was also critically short of maritime and military assets and did not achieve full mobilization until 1942. While the Soviet alliance provided a huge military benefit to Germany, which thereafter had to station only four regular and nine territorial divisions on its eastern border, even the quick Germany victory in Poland strained its 1939 military resources, leaving it with only six weeks of munitions supplies and no considerable manpower reserve. In the face of a British blockade, the only remaining state capable of supplying Germany with the oil, rubber, manganese, grains, fats and platinum it needed was the Soviet Union. In addition, Germany had imported 140.8 million Reichsmarks in Polish goods in 1938, and half of that territory was now held by the Soviet Union. The Soviets now occupied fields amounting to seventy per cent of Poland's oil production. Germany needed more of an economic alliance with the Soviet Union for raw materials than the economic partnership that the August 19, 1939, agreement provided. At the same time, the Soviets' demands for manufactured goods, such as German machines, were increasing while its ability to import those goods from outside decreased when many countries ceased trading relations after the Soviet entry into the Molotov–Ribbentrop Pact. The Soviet Union could offer precious little technology, while Germany possessed the technology the Soviet Union needed to build a blue-water fleet. Accordingly, for the next six weeks, especially after the Soviet and German invasions of Poland, Germany pressed hard for an additional agreement. At the same time, the United States, supplied over 60% of Soviet machines and equipment, stopped armament shipments to the Soviet Union after the Molotov–Ribbentrop Pact. It imposed a full embargo after the Soviets 1939 invasion of Finland. Soviet quality controllers were expelled from the United