In a feudal system, a vassal, akin to a serf in most contexts, in general worked land on a lord's fiefdom in exchange for some of the produce from the land and some military protection.
The Manhattan Project was the project of the first atomic bomb produced by the United States (first utilized in Hiroshima and Nagasaki, eventually influencing the surrender of Japanese forces). This was a major turning point of WWII.
Osage society was organized into a complicated system of clans, or family groups. Originally there were 14 clans, but these were later expanded to 24. Clans were further divided into Sky People and Land People. The Osage believed all members of a clan were descended from a common ancestor and were related.
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It taught us how to make an election and how to bring peace
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