The system of feudalism that evolved in western europe ultimately led to the emergence of the Hundred Year Wars. It was<span> a series of religious </span>wars<span> fought for control of Jerusalem. During the Crusades, many </span>feudal<span> lords died, so kings reclaimed their land and regained power.</span>
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The German occupation of Czechoslovakia is associated with the supposed ethnic connection of the population of the area annexed by the Empire under the command of Hitler. The Nazi dictator, therefore, required the possession of these lands in order to keep all the Germanic peoples together with the German Empire, which is still the idea of Pangermanism, which contributed to the beginning of the war.</span>
A possibility is because others thought it was wrong to force breed other species with each other