I believe it would be either factories during the Industrial Revolution or possibly agriculture. Hope I could help.
Nicaragua was involved in the Iran-Contra affair Contra forces received money from the sale of missiles.
The black (1347-1350) was an epidemic that devastated the population of Europe and Asia. The Black Death marked an end in Italy, its impact was profound and resulted in wide ranging, economic cultural and religious changes
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The mongols are known to have valued merchants and trade and helped make trading in the Silk Road easier and safer.
