Now the children of Israel after their number, to wit, the chief fathers and captains of thousands and hundreds, and their officers that served the king in any matter of the courses, {a} which came in and went out month by month throughout all the months of the year, of every course were twenty and four thousand.

(a) Who executed their charge and office, which is meant by coming in and going out.

Wesley's Notes

27:1 Officers - The standing militia of Israel as it was settled under their several officers. Of courses - In all the business wherein the king had occasion for these persons who were to attend him by turns. Came in, and c. - who being armed and mustered, and to wait upon the king, at Jerusalem or other places, as the king should see fit. By this order near three hundred thousand of his people were instructed and exercised in the use of their arms, and fitted for the defence of their king and kingdom when it should be needful, and in the mean time sufficient provision was made against any sudden tumults or irruptions of enemies. And this monthly course was contrived that the burden of it might be easy and equally distributed among the people.

Jamieson-Fausset-Brown Bible Commentary

CHAPTER 27

1Ch 27:1-15. Twelve Captains for Every Month.

1. came in and went out month by month-Here is an account of the standing military force of Israel. A militia formed, it would seem, at the beginning of David's reign (see 1Ch 27:7) was raised in the following order: Twelve legions, corresponding to the number of tribes, were enlisted in the king's service. Each legion comprised a body of twenty-four thousand men, whose term of service was a month in rotation, and who were stationed either at Jerusalem or in any other place where they might be required. There was thus always a force sufficient for the ordinary purposes of state, as well as for resisting sudden attacks or popular tumults; and when extraordinary emergencies demanded a larger force, the whole standing army could easily be called to arms, amounting to two hundred eighty-eight thousand, or to three hundred thousand, including the twelve thousand officers that naturally attended on the twelve princes (1Ch 27:16-24). Such a military establishment would be burdensome neither to the country nor to the royal treasury; for attendance on this duty being a mark of honor and distinction, the expense of maintenance would be borne probably by the militiaman himself, or furnished out of the common fund of his tribe. Nor would the brief period of actual service produce any derangement of the usual course of affairs; for, on the expiry of the term, every soldier returned to the pursuits and duties of private life during the other eleven months of the year. Whether the same individuals were always enrolled, cannot be determined. The probability is, that provided the requisite number was furnished, no stricter scrutiny would be made. A change of men might, to a certain degree, be encouraged, as it was a part of David's policy to train all his subjects to skill in arms; and to have made the enlistment fall always on the same individuals would have defeated that purpose. To have confined each month's levy rigidly within the limits of one tribe might have fallen hard upon those tribes which were weak and small. The rotation system being established, each division knew its own month, as well as the name of the commander under whom it was to serve. These commanders are styled, "the chief fathers," that is, the hereditary heads of tribes who, like chieftains of clans, possessed great power and influence.

captains of thousands and hundreds-The legions of twenty-four thousand were divided into regiments of one thousand, and these again into companies of a hundred men, under the direction of their respective subalterns, there being, of course, twenty-four captains of thousands, and two hundred forty centurions.

and their officers-the Shoterim, who in the army performed the duty of the commissariat, keeping the muster-roll, &c.

Matthew Henry's Concise Commentary

27:1-15 In the kingdoms of this world readiness for war forms a security for peace; in like manner, nothing so much encourages Satan's assaults as to be unwatchful. So long as we stand armed with the whole armour of God, in the exercise of faith, and preparation of heart for the conflict, we shall certainly be safe, and probably enjoy inward peace.