Joshua tells the crowd that there are seven tribes that haven't received land yet. He requests that scouts be sent out to survey and document the land. Once they return, the land will be divided seven ways, with Joshua casting lots to see who gets what.
That is the mark of a true leader—make everyone else do the work, then gamble with their lives and futures. Good move.
We're kidding; this is actually a very concise way to divvy up some land (1-10).
The rest of the chapter describes the land that is cast to the tribe of Benjamin (11-26).