Europe in the years after the Treaty of Aix-la-Chapelle in 1748, source: Wikipedia.
In the aftermath of the War of Austrian Succession in France, there was a general resentment at what was seen as a foolish throwing away of advantages (particularly in the Austrian Netherlands, which had largely been conquered by the brilliant strategy of Marshal Saxe), and it came to be popular in Paris to use the phrases Bête comme la paix ("Stupid as the peace") and La guerre pour le roi de Prusse ("The war for the king of Prussia").
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