Leidang

The institution known as leiðangr (Old Norse), leidang (Norwegian), leding (Danish), ledung (Swedish), expeditio (Latin) or sometimes lething (English), was a form of conscription to organise coastal fleets for seasonal excursions and in defence of the realm typical for medieval Scandinavians and, later, a public levy of free farmers. In Anglo-Saxon England, a different system was used to achieve similar ends, and was known as the fyrd.