In 1206, Genghis Khan gave large lands with people as share to his family and loyal companions, of whom most were people of common origin. Shares of booty were distributed much more widely. Empresses, princesses and meritorious servants, as well as children of concubines, all received full shares including war prisoners. For example, Kublai called 2 siege engineers from the Ilkhanate in Middle East, then under the rule of his nephew Abaqa. After the Mongol conquest in 1238, the port cities in Crimea paid the Jochids custom duties and the revenues were divided among all Chingisid princes in Mongol Empire accordance with the appanage system. As loyal allies, the Kublaids in East Asia and the Ilkahnids in Persia sent clerics, doctors, artisans, scholars, engineers and administrators to and received revenues from the appanages in each other's khanates.