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Because back in those days most wars lasted a few months and were between 2 countries and had a Death Rate of about 100 thousand at the most. This war had over 6 million deaths with an incredible duration of 4 years. Once the war was ended, people swore never to start a war again after the tragedy caused by World War 1. [France was left in shambles, Germany went bank rupt and lost 90% of its army and most of its defence systems due to the treaty of versailles]

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16y ago

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