The divine warrior drives the enemies out of the land and establish His rule. The enemies are Sin, Death an Devil making war with Almighty Creator God for the right to rule the souls of humans. Although the Victory is decisively finished at the Cross and the Tomb, the battle of the Church Militant wages on to claim souls for one kingdom or the other.
The war in each soul is between Lie and Truth: Will the soul ( mind, will and emotions) yield to the Lie which it can see or to the Truth which it can only believe. The Word of God (as in Psalm 68) let’s us see the truth in a different way so that the soul can celebrate the Gospel of Jesus Christ, our Divine Warrior, which is the power of God unto salvation.
The Warrior drives the enemies out of the Promised Land so He can give it to His people = Christ drives Sin and Death out of Eternal Life so He can give it to us. Claim and reclaim daily the Land (the Life) we have been given to possess by repentance and faith in the Gospel. A Victory Psalm helps faith. Blessed be God.