Final answer:
The Canaanite city-state that Joshua and his army laid waste to is called Jericho.
Step-by-step explanation:
The Canaanite city-state that Joshua and his army laid waste to is called Jericho. It was discovered in what is now the West Bank of Palestine. According to the biblical account, the walls of Jericho fell when Joshua and his men marched around them blowing horns.