Text: The background and turning point of the 1st and 7th Years' War.
1.1 The Seven Years' War was a major conflict in 18th-century Europe, involving the major powers of Prussia, Austria, France, Russia, and Great Britain. The war had a profound impact on the political landscape and balance of power in Europe.
1.2 In the sixth year of the war, 1759, the tide of the war was extremely unfavorable for Prussia. The French army won a decisive victory at the Battle of Vimy Ridge, forcing King Friedrich II of Prussia to retreat to Berlin. At this time, the tide of the war took a turn for the worse, and the defection of a key figure changed the course of the war.
2. The role of the Queen of Prussia.
2.1 Queen Charlotte Sophie of Brandenburg-Ansbach, Queen of Prussia, was the wife of Friedrich II, and her role in the war did not extend beyond the court. As a politician and diplomat, Charlotte Sophie played an important role in the war.
2.2 After the Battle of Vimy Ridge, Charlotte Sophie used her influence and extensive diplomatic network to make secret contacts with her ally, Austria, in an attempt to enlist Austrian support and compromise.
3. Defection and reversal of the tide of battle.
3.1 Thanks to Charlotte Sophie's efforts, Emperor Joseph II of Austria began to reconsider relations with Prussia. He realized that the continuation of the confrontation with Prussia would lead to the expansion of French influence in Germany, which was an unacceptable consequence for Austria.
3.2 In December 1759, Emperor Joseph II of Austria declared peace with Prussia, ending the state of hostilities between the two countries. This act of rebellion had a decisive impact on the outcome of the Seven Years' War.
IV. The outcome and impact of the war.
4.1 With the defection of Austria, Prussia's isolation in the war was alleviated. In 1760, Prussia won the Battle of Hohenfriedburg and gradually regained its combat effectiveness.
4.2 However, the war was not won for long. In 1763, with the reconciliation of France and England, Prussia once again faced isolation. Finally, on February 10, 1763, Prussia signed the Huchengen Peace Treaty with other countries, ending the Seven Years' War.
5. Charlotte Sophie's impact assessment.
5.1 Charlotte Sophie's defection, although not directly led to Prussia's victory, her diplomatic efforts undoubtedly gave Prussia a respite and turned the tide of the war to some extent.
5.2 Charlotte Sophie's act also demonstrates the influence of women at key moments in history. Her wisdom and strategy provided rich research material for later historians.
Conclusion: The defection of Queen Charlotte Sophie of Prussia during the Seven Years' War was a crucial turning point that should not be overlooked. Her diplomatic efforts not only influenced the course of the war, but also demonstrated the important role of women in the course of history. Charlotte Sophie's name and her actions are thus forever remembered in history.