Smoke Signals (1 janv. 150 av. J.-C. – 1 févr. 1300)
Description:
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.Ajouté au bande de temps:
Date:
1 janv. 150 av. J.-C.
1 févr. 1300
~ 1451 years
