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>
There were tribes all over the place, practically each one spoke different languages and lived differently
The United States provided critical aid to Great Britain and the Soviet Union.
The third option is the answer
