When does Sartre's "Les jeux sont faits" supposedly take place?

It was published in 1947. The setting is clearly in "modern times" as there are references to phonographs, elevators, machine guns, motor vehicles and armored tanks. But there is a "regent" who lives in a palace, and whose armies are constantly marching through the city and creating much consternation. There is also a large insurrection being planned against him.

This doesn't sound like France two years after the end of the second world war. It also does not sound like a thinly disguised account of Nazi occupation, since the upper class is presented as viewing the insurrectionists with disdain (in contrast to how I would imagine anyone in France viewing the resistance.)

The political issues are presented in terms of class distinctions among the French, rather than in terms of occupation by a foreign army.

Does the story correspond to an actual period of French history? Or is it purely fanciful? I thought a regent was someone who temporarily held the throne till the king or queen came of age, but the French monarchy ended with Louis XVI, didn't it?