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During the war the telegraph became a promenant method of communication for both sides.
Telegraph
Sped up dilvery
telegraph, Morse code
The telegraph and newspapers.
During the war the telegraph became a promenant method of communication for both sides.
The telephone followed the telegraph in terms of communication technology.
Telegraph (as in Zimmerman Telegram)
telegraph
Communication by telegraph has been outmoded by wireless communication methods.
Rapid communication
Telegraph
The telegraph allowed faster communication across America and eventually the world.
(telegraph)
telegraph
Morse
Morse code.