Another census. The book started with one, a role call of over 20 year old men ready to fight… All the clans except the levites, who don’t fight.
The Israelites are doing well, despite all the plagues, poison snakes etc. There would be about 200000 able bodied men. This is preparation for taking the holy land.
And the point is made that none except two, Joshua and one other, were alive when they left Egypt. That generation has indeed perished without seeing the holy land.
But their children will have the inheritance of God’s promise.