Joshua led the Israelite's into the promised land. They crossed the Jordan river carrying the "Presence of the Lord". They overcame every stronghold of the enemy as they obeyed the Lords unique guidance in each situation. Where they did not obey His guidance they failed. The promise was where ever they walked God would give them the land. Joshua 1:3
The promised land for the Christian today is exactly the same. Whether it is in their personal life, the lives of people they know. Or the lives of those God guides them to come across.
The operative word here is "Overcome".