This is employed when in the course of a campaign it becomes desirable to protect some locality with the best imitation of permanent defences that can be made in a short time, ample resources and skilled civilian labour being available.
Ona se podiže kad u tijeku ratnog pohoda postane poželjno zaštiti određenu lokaciju s najboljim oponašanjem trajne obrane načinjenom u kratkom vremenu uz dostupne obilne resurse i vještu civilnu radnu snagu.