Rivalries between European powers and growth of military in the 20th century was what made Many European powers eager to go to war with one another.
The Europeans due to the rise in their powers and the conflict of interest first fought the WW1.
This was involved the allied and the axis powers. The second war that they fought was the second world war.
The Europeans were at war in the 20th century due to the fact that they were protecting their national interests as well as defending their territories.
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