A telegram is a message sent by a telegraph, which is also called a wire.
Over time, there have been many means of communicating, such as messenger pigeon, telephone, text message, letter, and email. Another is the telegram, which is a message sent by a telegraph. People often said a telegram was sent "by wire" because the sender and receiver of telegrams were connected by a wire. The electric telegraph has been around since the late 1800's. In the Civil War, important information was sent by telegram, which was the speediest means of communication.