It may overlap with, but is not the same as, punitive destruction of an enemy's resources, which is done for purely strategic/political reasons rather than strategic/operational reasons. The practice can be carried out by an army in enemy territory, or in its own home territory. It is a military strategy where all of the assets that are used or can be used by the enemy are targeted, such as food sources, transportation, communications, industrial resources, and even the people in the area. A scorched earth policy is a military strategy which involves destroying anything that might be useful to the enemy while advancing through or withdrawing from an area.