What was the reasoning and result of the Saint Bartholomew's Day massacre?

King Charles IX ordered the murder of Huguenot Protestant leaders after the failed assassination attempt by his mother

Explanation:

So, King Charles of France was influenced by his mother, Catherine de Medici to have the leaders of the Huguenots killed in order to "stop a rebellion" after her failed attempt to have Admiral Gaspard de Coligny killed. Charles was trying to apease the Huguenots upset by promising to have the assassination attempt investiagated, when his mother told him the Huguenots were on the brink of rebellion to derail investigations. Charles gave the go-ahead for the murder of the leaders which were all gathered in Paris for a wedding and the bloodshed began. Catholic Parisans attacked the Huguenots and even when a order from the King to stop the bloodshed was issued, it fell on deaf ears. Over 70,000 Huguenots were killed throughout France and it is mainly regarded as the revival of the relgious civil war of France.

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on the morning of  july 21,  1861, general mcdowell ordered the  unionarmy to attack. it was on this hill that  confederate  colonel thomas jackson and his forces held back theunion  troops.