Smoke Signals (1 gen 150 anni a. C. – 1 feb 1300 anni)
Descrizione:
In ancient china soldiers along the great wall used smoke signals to signal an attack from tower to tower. smoke signals are one of the earliest forms of long distance communication.Aggiunto al nastro di tempo:
Data:
1 gen 150 anni a. C.
1 feb 1300 anni
~ 1451 years
