It is an instructive fact that the history of these wars is given so shortly. A single verse is all that is given to most of the campaigns. This brevity shows very clearly that another spirit than that which moulded ordinary histories guided the composition of this book. It would be beyond human nature to resist the temptation to describe great battles, the story of which is usually read with such breathless interest, and which gratify the pride of the people and reflect glory on the nation. It is not the object of Divine revelation to furnish either brief annals or full details of wars and other national events, except in so far as they have a spiritual bearing--a bearing on the relation between God and the people. From first to last the purpose of the Bible is simply to unfold the dispensation of grace,--God's progress in revelation of His method of making an end of sin, and bringing in everlasting righteousness.
We shall briefly notice what is said regarding the different undertakings.
1. The first campaign was against the Philistines. Not even their disastrous discomfiture near the plain of Rephaim had taught submission to that restless people. On this occasion David carried the war into their own country, and took some of their towns, establishing garrisons there, as the Philistines had done formerly in the land of Israel. There is some obscurity in the words which describe one of his conquests. According to the Authorised Version, "He took Metheg-ammah out of the hand of the Philistines." The Revised Version renders, "He took the bridle of the mother city out of the hand of the Philistines." The parallel passage in 1 Chron. xviii. 1 has it, "He took Gath and her towns out of the hand of the Philistines." This last rendering is quite plain; the other passage must be explained in its light. Gath, the city of King Achish, to which David had fled twice for refuge, now fell into his hands. The loss of Gath must have been a great humiliation to the Philistines; not even Samson had ever inflicted on them such a blow. And the policy that led David (it could hardly have been without painful feelings) to possess himself of Gath turned out successful; the aggressive spirit of the Philistines was now fairly subdued, and Israel finally delivered from the attacks of a neighbour that had kept them for many generations in constant discomfort.
2. His next campaign was against Moab. As David himself had at one time taken refuge in Gath, so he had committed his father and mother to the custody of the king of Moab (1 Sam. xxii. 3, 4). Jewish writers have a tradition that after a time the king put his parents to death, and that this was the origin of the war which he carried on against them. That David had received from them some strong provocation, and deemed it necessary to inflict a crushing blow for the security of that part of his kingdom, it seems hardly possible to doubt. Ingratitude was none of his failings, nor would he who was so grateful to the men of Jabesh-gilead for burying Saul and his sons have been severe on Moab if Moab had acted the part of a true friend in caring for his father and mother. When we read of the severity practised on the army of Moab, we are shocked. And yet it is recorded rather as a token of forbearance than a mark of severity. How came it that the Moabite army was so completely in David's power? Usually, as we have seen, when an army was defeated it was pursued by the victors, and in the course of the flight a terrible slaughter ensued. But the Moabite army had come into David's power comparatively whole. This could only have been through some successful piece of generalship, by which David had shut them up in a position where resistance was impossible. Many an Eastern conqueror would have put the whole army to the sword; David with a measuring line measured two-thirds for destruction and a full third for preservation. Thus the Moabites in the south-east were subdued as thoroughly as the Philistines in the south-west, and brought tribute to the conqueror, in token of their subjection. The explanation of some commentators that it was not the army, but the fortresses, of Moab that David dealt with is too strained to be for a moment entertained. It proceeds on a desire to make David superior to his age, on unwillingness to believe, what, however, lies on the very surface of the story, that in the main features of his warlike policy he fell in with the maxims and spirit of the time.