What does Numbers 21:1 mean?

When the Canaanite king of Arad, who lived in the southern part of Canaan, heard that Israel was coming by the road through Atharim, he attacked them and took some Israelites captive. Numbers 21:1 - Modern Text Bible

(Israel’s journey into Canaan immediately brings conflict. The local king sees them as a threat and strikes first, capturing some of their people.)