外交革命
A significant reversal in French-Habsburg relations known as the Diplomatic Revolution, occurred in 1756. In a move masterminded by Austrian diplomat Wenzel Anton von Kaunitz, France and Austria became allies for the first time in over two hundred years. The alliance was sealed with the marriage of Austrian princess Marie Antoinette to the French Dauphin, who later became King Louis XVI. The alliance was formalised with the signing of the First Treaty of Versailles in 1756.