Smoke signals have a long history as one of the oldest forms of long-distance communication. Originally, it was a tool used to convey information, warn of danger, or gather crowds. In ancient China, soldiers along the Great Wall used smoke signals from lighthouses to warn each other of enemy incursions. The color of the smoke represents the size of the invading army. Through regularly established lighthouses and garrisons, messages can be quickly transmitted along the 7,300 kilometers of the Great Wall.
Smoke signals allowed the inner city to know the status of invaders in real time, thus coordinating the actions of defense and reinforcement forces.
In fact, the misuse of smoke signals is also regarded as one of the important reasons for the collapse of the Western Zhou Dynasty in the 8th century BC. King Zhou Xuan is said to have sometimes used false alarms to please his concubines, an act that had serious consequences for the stability of his rule. As the alarm lost substance, the trust of his loyal generals in his orders began to falter, ultimately leading to the dynasty's downfall.
In Chinese history, smoke signals were not only a warning tool, but also played an important coordination role between troops.
Soldiers along the Great Wall used smoke signals to warn commanders in the inner city so they could deploy defenses in time.
In addition, other cultures also use smoke signals to convey messages. For example, among the Native Americans who used smoke signals, each tribe had its own signaling system. Both the location of the trigger flame and the color of the smoke are critical to interpreting the information. Such signals are not limited to safety warnings, but include messages about certain activities in the community or requests for meetings.
However, the use of smoke signals is not without risks. In some cases, misinterpretation of signals can lead to serious consequences. In the case of Australia's Aboriginal people, smoke signals were often used to notify others of their presence. Sometimes, false smoke signals can lead to misunderstandings, leading people to misunderstand certain conditions, ultimately posing a threat to the safety of the tribe.
In one recorded incident, a smoke signal was misinterpreted as "We are coming" when it was actually the signal for a gathering of hunters.
Underlying these misunderstandings actually reflects the complexity of the signaling system and the fact that people may interpret or misunderstand information on their own in extremely stressful situations. In a sense, this is a process of continuous experimentation and learning by humans in the use of communication tools.
As time goes by, smoke signals do not completely disappear, but exist in new forms. Contemporary organizations such as the Red Cross and the military use improved smoke bombs to mark locations or deliver emergency messages. In addition, during the papal election, cardinals will still use smoke signals to notify the outside world of the election of a new pope with white smoke or black smoke.
Black smoke means the election failed, while white smoke means a new pope has been chosen.
Furthermore, modern aviation has also created the technology of writing in the sky, extending the visual application of smoke signals. This is not only a continuation of history, but also a tribute to the past in the ever-evolving means of communication.
From the evolution of smoke signals, we can see how humans use the environment to effectively convey information, and behind this is the result of the integration of technology and culture. The fall of the Zhou Dynasty in the West has invisibly become a case that reminds students of history that the effective use and scope of any communication system, no matter how ancient, requires caution in dealing with its potential dangers of misuse.
Now, when we revisit these ancient signal cultures, can it still trigger our reflection and review of our dependence on modern communication methods?