Judges 1:1

Now after the death of Joshua - How long after the death of Joshua this happened we cannot tell; it is probable that it was not long. The enemies of the Israelites, finding their champion dead, would naturally avail themselves of their unsettled state, and make incursions on the country.

Who shall go up - Joshua had left no successor, and every thing relative to the movements of this people must be determined either by caprice, or an especial direction of the Lord.