leiðangrar
A leiðangr was a type of Scandinavian military levy or expedition, primarily associated with the Viking Age and the subsequent medieval period in Norway and Iceland. The term itself derives from Old Norse "leiðangr," which means "journey" or "expedition." These were essentially conscripted military forces, often naval in nature, organized by local districts or communities.
The purpose of a leiðangr varied. It could be used for defensive measures against raids or invasions,
In Iceland, which was settled by Norwegians, a similar system existed, though its scale and frequency differed