What does Joshua 23:2 mean?

Joshua called together all the leaders, elders, judges, and officials of Israel. He said, 'Look, I'm old now, and you all know what the Lord your God has done for you and these nations because you’ve seen it with your own eyes. The Lord fought for you.' Joshua 23:2 - Modern Text Bible

(Joshua gathers everyone who leads or judges the people. He reminds them that they’ve witnessed God’s power firsthand, not just heard about it.)