Numbers is the culmination of the story of Israel's exodus from oppression in Egypt and their journey to take possession of the land God promised their fathers. As such it draws to a conclusion the themes introduced in Genesis and played out in Exodus and Leviticus: God has promised the Israelites that they shall become a great (i.e. numerous) nation, that they will have a special relationship with Yahweh their god, and that they shall take possession of the land of Canaan.