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The telegraph
Samuel Morse sent the first telegraph message from Washington DC to Baltimore in 1844. The message he sent said, "What hath God wrought?"
Within a decade, thousands of miles of telegraph cable lines were in use all over the United States, and then by the 1860s a transatlantic cable connected the USA to Europe for communication.
Answer:
Getting sick
Explanation:
Getting sick because they were not very clean in the dark ages.
Answer:
The Roman and Byzantine systems had problems whenever they had a run of several bad or weak Emperors in a row, and the Western Empire had such a run in the fifth century. It could survive the fifth century with better leadership and being able to tax the large landowners.
I have no idea I just really like points!