Jude 6, the angels which kept not their first estate were Satan and his followers. The war in heaven is a generally accepted belief there had to be someone there to fight it. The spirit children of heavenly father cast him out. These spirit children of God can and often are given the assignment to reveal gods will to us. These inspired thoughts are useful.
All wars have strategies.
The winners of wars are more intelligent and have more experience due to the exercise of their free agency. Satan was not for free agency. Satan was cast out during the war in heaven. If we had a military leader that had revelation, winning a war would be inevitable. A prophet leader, for those that believe, would establish a very successful nation.