Someone decided to scorch the earth to prevent the enemy from using the land.
Кто-то решил выжечь землю, чтобы помешать врагу использовать эту территорию.
Definitions
To 'scorch the earth' means to destroy anything that might be useful to an enemy while advancing through or withdrawing from an area. It can also refer more generally to taking drastic, all-out actions that leave nothing behind, often in a way that is ruthless or leaves lasting damage.