The Cumans, memorable antagonists from the first game, reappear in Kingdom Come: Deliverance 2, initially in a side quest titled "Invaders." This guide explains how to locate their camp.
How to Start "Invaders" in Kingdom Come: Deliverance 2
The "Invaders" side quest becomes available early in Kingdom Come: Deliverance 2. A few days after parting ways with Hans Capon, return to the Troskowitz inn and speak with the innkeeper. She'll mention the Cumans causing unrest and ask for your assistance in serving them.
This initiates the quest. You can choose to serve the Cumans or refuse. Regardless, a conflict between them and the townsfolk will erupt. Your dialogue choices will determine which side you're forced to support.
After the fight concludes, the Cumans will depart, and Vuytek will task you with preventing their return to Troskowitz.
Kingdom Come: Deliverance 2: Cuman Camp Location
To find the Cuman camp, begin by gathering information in Semine. Travel to Semine (southwest of Troskowitz) and speak with Lord Semine to learn more about the Cumans' whereabouts.
The Cuman camp is situated southwest of the Nomads' Camp, which lies west of Zhelejov. The map below shows its exact location.

You can safely pass through the Nomads' Camp during the day and follow a path leading downwards to reach the Cuman camp. Interact with the Cumans there to advance the quest.
This concludes the guide on locating the Cuman camp and completing the "Invaders" side quest in Kingdom Come: Deliverance 2. For more Kingdom Come: Deliverance 2 tips and guides, check out The Escapist.