One of the effects was the North asking the South to free the slaves. However, the south did not want to, and so it became the reason for the North to get ready for the Civil War.
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Answer:
It was created after the event took place
Explanation:
There are two types of sources in history, primary and secondary.
Mount Vesuvius erupted in AD 79 while the painter painted it on the oil canvas in 1812. The painter was not present during the event, the painting is an imaginary depiction of the eruption, so it is a secondary source.
If the same painting was created by someone who was present when the volcano erupted, then it would have been considered as primary source.
Great Britain played a role in the Louisiana Purchase by pushing France to extreme anxiety through war. Great Britain's war with France resulted in Napoleon needing money to finance the conflict. As a result, he was forced to sell Louisiana to the US in order to raise funds
