Caravan
    Caravan (trade), name applied to groups of pilgrims or merchants organized for mutual help and protection against the hazards of travel, particularly on the deserts of Asia and Africa. On these journeys, many of which cover long distances, the beasts of burden most frequently used are the camel, donkey, and, in South America, the llama. The animals are traditionally arranged in a single file, which in larger caravans may extend for almost 10 km (6 mi). Pilgrims on their way to the holy city of Islam, Mecca, particularly the groups that assemble annually in Cairo and in Damascus, Syria, form the most celebrated caravans. Groups en route from these cities sometimes consist of several thousand people, and the number of camels used for the journey may be more than 10,000.