Tin (to make bronze) was difficult to secure in ancient times, the Levant and Mesopotamia devoid of such deposits so the tin was brought from Afghanistan, across where today are the harsh deserts of southern Iran, during the Ice Age green, the tin route at that time from Afghanistan west through the bustling Ice Age trading towns Shahr-i Sokhta, next Shahdad, and on to Susa of the Elamites, then up the Euphrates river to Mari and on to the Levant, even to Crete.