Scorched earth policy is a military strategy of destroying everything that allows an enemy military force to be able to fight a war, including the deprivation and destruction of water, food, humans, animals, plants, and any kind of tools and infrastructure. Its use is possible by a retreating army to leave nothing of value worth taking, to weaken the attacking force, or by an advancing army to fight against unconventional warfare… The Scythians used scorched-earth methods against the Persian Achaemenid Empire, led by King Darius the Great, during his European Scythian campaign. The Scythians, who were nomadic herders, evaded the Persian invaders and retreated into the depths of the steppes after they had destroyed food supplies and poisoned wells. Details of the campaign are in the ‘Royal Scythia, Greece, Kyiv Rus‘ book.