What does Deuteronomy 1:41 mean?

Then you answered, 'We’ve sinned against the Lord! We’ll go up and fight, just like the Lord told us.' So each of you got your weapons, thinking it would be easy to go up into the hills. Deuteronomy 1:41 - Modern Text Bible

(After realizing their mistake, the people tried to fix it on their own terms, but it was too late.)