But based on migrations in the medieval period it seems that economic, social, political and environmental are the main reasons that push people to move from one place to another. And these aspects create "push" and "pull" factors. Migrations in terms of “push” from countries of origin and “pull” from destination countries (Balarajan, Cameron and Goldin, 213-214). In other words, push factors are the reasons why people leave an area and pull factors are the reasons why people move to a particular area. As mentioned above, there are three different civilizations that migrated into a particular area during the medieval period. Whether voluntary or involuntary migration, it appears that all three different civilizations experienced push and pull factors that motivated them to migrate. Arabs migrated to East Africa because they endure severe push factors such as floods, droughts, wars and poverty and seek pull factors in East Africa such as greater resource wealth, a safer environment and fertile lands. In contrast, the migration of the Vikings, Saracens, and Magyars into Northern Europe and France was very similar to the Arab migration into East Africa. Because Vikings, Saracens and Magyars trigger attraction factors that push them to move, due to the fertile lands, the good food suppliers, the deserted spaces of northern Europe and France. However, when Northern Europe and France began to suffer from the crisis, most of the population moved due to this