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http://auth.grolier.com/cgi-bin/go_up_login?formu=260687&formp=go

http://www.vahistorical.org/collections-and-resources/virginia-history-explorer/american-turning-point-civil-war-virginia/wagi-1

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https://www.youtube.com/watch?v=xsDk5_bktFo

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The telegraph helped because it made communicating a lot easier. It also helped save lives because you can call faster retreats and you could also ask for a medic.

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Telegraphs allowed far away army commanders to communicate more efficiently because of th added responsibility of managing information same with their armies

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Before telegraphs the time it took messages to go to the right place was limited by the swiftness of animals.

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Each telegraph office cannot be connected directly to all other telegraph offices because construction costs would be too expensive. Line costs were very high so method were developed to send a number of messages over a single line all at the same time.

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Telegraphs used telegraph lines, just like telephones lines. Needles pointed to a letter of the alphabet, when a pencil was used it marked a piece of paper with a code that's for a letter of the alphabet.

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Each telegraph had a transmitter and a receiver connected by one or more wires that carried electric currents from a battery.

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Telegraphs were invented in England and the United States in the 1830's.