In Numbers 1:2 in the bible, Joshua was told to lead the people into the Promised Land, to go in and take position of what the Lord was giving them. The modern day ministry of deliverance is similar in many ways and this article explores that connection.
In the natural, Joshua led the people in to take possession of the land. Someone else lived there, and they needed to be routed out, but the reality was that God had already purposed to give it to them. They had to be obedient, do warfare and expend time and energy in the natural but in the spirit realm the victory had already been won.