The Molotov-Ribbentrop pact , or the Nazi-Soviet pact was the guide that delineated the spheres of interest between both powers. It was <span>confirmed by the "supplementary protocol" of the </span>German–Soviet Frontier Treaty <span>amended after the joint </span><span>invasion of Poland.</span>
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Conditions on the middle passage were harsh and many died on the way due to malnutrition and disease