One of the vital instruments which facilitated long distance trade was portage and the domestication of beasts of burden.Organized caravans, visible by the 2nd millennium BC, could carry goods across a large distance as fodder was mostly available along the way.The domestication of camels allowed Arabian nomads to control the long distance trade in spicesand silk from the Far East to the Arabian Peninsula. Caravans were useful in long-distance trade largely for carrying luxury goods, the transportation of cheaper goods across large distances was not profitable for caravan operators. With productive developments in iron and bronze technologies, newer trade routes dispensing innovations of civilizations began to rise.