I need help with my study guide there are more questions

Although a number of things brought about world war one there was one even that push to europe over the edge. what was that event?

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10. how were the mycenaeans and the minoans similar? they did not enslave anyone or tolerate slavery in any form. they had an organized and strong central government. they designed and built heavily fortified settlements. they reigned and traded in and around the aegean sea.