The Hunger Games: The Ballad of Songbirds & Snakes adds a lot of brutal backstory to the world of Hunger Games, with even minor details revealing just how grim the setting really is. The Capitol is portrayed as a devastating totalitarian government, ruling over the twelve other The Hunger Games districts with an iron fist. They do this through starvation, bombings, and the annual Hunger Games, which require two children from each district as tribute. Their laws are carried out by the Peacekeepers, providing the story with an army for the heroes to overcome.

https://screenrant.com/ballad-of-songbirds-and-snakes-snow-peacekeepers-line-capitol-darker/