What problems did the Israelites face when they returned to Canaan?
This is a religious, rather than a historic question. Please check your book or the Bible for the answer your teacher expects.
As there is no physical historical evidence for Any of the events in the bible, this is not history. I would guess the story is one of Prejudice,homelessness and persacution at the hand of the "Cannanites". Ask a priest and a rabbi.
he was a rebi