What did the kings of Prussia and austria do in the declaration of pilintz?

In the Declaration of Pillnitz, issued in August 1791, the kings of Prussia and Austria, Frederick William II of Prussia and Leopold II of Austria, expressed their concern over the situation in revolutionary France. They proclaimed their intention to intervene militarily to protect the French monarchy and restore order, should other European powers join them. This declaration aimed to intimidate revolutionary France and demonstrate a united front against the revolutionary ideals that threatened monarchy and stability in Europe. However, it ultimately contributed to escalating tensions, leading to the War of the First Coalition against revolutionary France.