Joshua 7:1 - 9:27

A chain is only as strong as it's weakest link.  In this case - one person disobeyed God and the entire population suffered defeat at the hands of the enemies.  When the person (Achan) was found out by a series of 'lots' then he was stoned for coveting, stealing and disobeying per the law of the time.  Aren't we thankful Christ's death makes stoning unnecessary in our times???

After this, they were successful in battle.  And Joshua built an altar and read teh entire law of Moses to all the people - men, women, children, aliens.

Then deception.  From a neighbor that they were not supposed to make a treaty with.  This happened because they did not seek God first.  The treaty was not broken, but the people were not fully accepted.  Instead they became water carriers and wood cutters to the Israelites.  At least they were allowed to live.