1 Samuel 14:52

(52) All the days of Saul.—Although after the rout of Michmash the Philistines were driven out of their fastnesses in the land of Israel back into their own coast districts, yet all through the reign of Saul they continued to be powerful, and were a constant source of danger and trouble to the people. We know that in the end Saul lost his life in an engagement with this warlike and restless race, who were not finally crushed before the days of his successor, David. To keep them in check necessitated the maintenance of a standing army, which, in the days of David, became one of the great armed forces of the East. The reader of this verse is reminded at once of a similar military fancy of King Frederick William of Prussia, the founder of Prussian military greatness, and the father of the Great Frederick.