The reason why Germany declared war on Belgium even though they were a neutral country was because the Germans needed a way to get access to France and the only way to do that was to attack Belgium
Hope this helps! :)<span />
It could be argued that the "serf" was the "property" of the land during the Middle Ages, since under the feudal system that reigned supreme during this time, serfs (or peasants) had very little rights of their own.
The last one invest in heavily in machines and factories as well as new business...(of topic but do you go to rhs)