He made new sailing and navigating techniques, which made travel by boat much easier for the Europeans. But, on that note, his voyage to the new land forced Native Americans off of their land, and some of them into slavery. Columbus was violent and aggressive towards them in order to create what is now known as America.
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Answer:In 550 B.C.E. Cyrus the Great, the leader of the Persians, conquered the Medes and united the Iranian people under one ruler for the first time. Cyrus became the first king of the Persian Empire and went on to establish one of the largest empires in the world.
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