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>
<span>a group of words established by usage as having a meaning not deducible from those of the individual words</span>
The correct answer to this open question is the following.
Blanche K. Bruce’s senatorship was different from that of Hiram Revels in that although Hiram Revels was the first African American in the United States Senate, he did not serve the entire six years term that is allowed for senators. The first African American Senator that indeed served his whole six years term was Blanche K. Bruce.
Hiram Revels entered the Senate after white Senator Albert G. Brown resigned in 1861. When Revels term ended he went to lead what today is Alcorn State University. In the case of Blanche K. Bruce, his term started in 1875 and ended in 1881. After his period he went to work for the US Treasury.