Answer:
<em>The most powerful of these states was the Songhai Empire, which expanded rapidly beginning with king Sonni Ali in the 1460s. By 1500, it had risen to stretch from <u>Cameroon</u> to the Maghreb, the largest state in African history.</em>
In 1972, between Richard Nixon and George McGovern
This excerpt comes from a famous speech by Senator Douglas in the days leading up to the Civil War, in which he was making a point that the issue of slavery should be left up to the individual states, through a process of popular sovereignty.
But the Mongol Empire left other legacies: the Silk Road and its history of trade; cultural development; and the potential for a modern era characterized by the unity of disparate peoples, and relative peace.
American nationalism increased, creating an influx of volunteers for the military.