Question

What were signal towers used for? the great Wall of china lesson​

Answer 1

Answer:

I think this will help you

Explanation:

Watch towers and beacon towers were built to send smoke signals, a sign of danger. When the people saw smoke rising from the wall, they knew the enemy was approaching from the north. Other soldiers ran to assist the soldiers on wall to stop the enemy from entering China

Answer 2

Answer:

I think I will help you

Explanation:

Sections visible today were added later and made of brick. The defensive function of the impenetrable walls was further strengthened by the communication towers: guards lit bonfires and sent smoke signals to each other to spread news quickly.