Charles Ellicott Commentary Judges 2:7

"And the people served Jehovah all the days of Joshua, and all the days of the elders that outlived Joshua, who had seen all the great work of Jehovah that he had wrought for Israel." — Judges 2:7 (ASV)

All the days of Joshua. —Compare the whole passage (Judges 2:6–10) with Joshua 24:28-33, which is almost verbally identical with it. It is usually supposed that Joshua was about eighty at the time of the conquest of Canaan, because that was the age of his comrade Caleb (Joshua 14:7); if so, he had lived thirty years after the conquest. The gradual tendency to deteriorate after the removal of a good ruler is all too common (Acts 20:29; Philippians 2:12).

The great works of the Lord. —The crossing of the Jordan, the falling of the walls of Jericho, the battles of Beth-horon, Merom, etc.