What are the primary agents found in the vomiting agent group?

The primary agents found in the vomiting agent group are indeed represented by DA (Agent 15), DM (Diphosgene), and DC (Diphenylchlorarsine). These substances are classified as vomiting agents because they cause severe discomfort and irritation, primarily affecting the respiratory system and leading to vomiting. The primary purpose of these agents is to incapacitate rather than kill, making them more suited for scenarios where disruption of enemy operations is desired without resulting in high fatalities.

While other substances listed in different groups may have their own effects, the vomiting agents specifically target physiological responses and create a psychological impact, causing confusion and disarray among troops exposed to them.