Many countries have adopted a “scorched earth” policy (destroying anything that might be of use to an invading enemy) to prevent an invading army from living off the land. Both attackers and defenders in conventional wars and guerrilla struggles have used this strategy.
Since, as Napoleon is quoted as saying, “An army marches on its stomach,” procuring enough food to support an army in the field is a paramount concern for all commanders. Although weapons, clothing, and shelter are of the greatest immediate importance to soldiers, logistical support to provide food and material is often the decisive element in winning wars. Soldiers often had to truly “live off the land” even when in permanent garrisons or semipermanent encampments during lengthy sieges.
