Because it involved countries all over the world, there was new technology such as chemical warfare, tanks, planes, etc. and it was unrestricted warfare. The countries were attacking civilians as well. Also there were diseases.
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The Crisis of the Third Century (also known as the Imperial Crisis, 235-284 CE) was the period in the history of the Roman Empire during which it splintered into three separate political entities: the Gallic Empire, the Roman Empire, and the Palmyrene Empire.
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I hope it helped
After seizing political power in France in a 1799 coup d'état, he crowned himself emperor in 1804.
Egypt and Israel held peace accords there at camp david.
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P sure it's d :))) There's s quizzlet for it as well
