A more thorough explanation:

Drungus is a historical term that refers to a group of soldiers.

• During the Roman Empire, a drungus was a unit of soldiers that consisted of about 100 men.
• In medieval times, a drungus was a group of soldiers that were organized by a lord or noble.

The examples show that a drungus is a specific group of soldiers that are organized and led by a higher authority. It is not just a random group of soldiers, but a unit that has a specific purpose and structure.