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Answer: It ended in May 2nd
The division of the Roman Empire into eastern and western halves was a crucial step in the formation of the "Byzantine Empire", since this Empire "grew" in many ways from the former.
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Bessemer had been trying to reduce the cost of steel-making for military ordnance, and developed his system for blowing air through molten pig iron to remove the impurities. ... This made steel easier, quicker and cheaper to manufacture, and revolutionized structural engineering.
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