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Bull Run was the first war where railroads were used to transport soldiers. ... -->It was the first battle with large scale casualties (more than 20,000 dead or wounded). -->It played an important role in Union progress in the Western theater, and the Union victory gave Tennessee to the North.
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Chernobyl also led to a greater knowledge on optimising treatment and follow-up of survivors of acute radiation sickness. A better understanding of thyroid cancer radiation risks allowed us to respond better to other disasters, , to minimise potential adverse health consequences.
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