Store of victual - In these places he laid up stores of provisions, not only to enable them to endure a siege; but also that they might be able, from their situation, to supply desolate places.

he fortified

Isaiah 22:10,11 And you have numbered the houses of Jerusalem, and the houses have you broken down to fortify the wall...

captains

2 Chronicles 11:23 And he dealt wisely, and dispersed of all his children throughout all the countries of Judah and Benjamin, to every fenced city...

2 Chronicles 17:19 These waited on the king, beside those whom the king put in the fenced cities throughout all Judah.

Chronicles
The comparative indifference with which Chronicles is regarded in modern times by all but professional scholars seems to have been shared by the ancient Jewish church. Though written by the same hand as wrote Ezra-Nehemiah, and forming, together with these books, a continuous history of Judah, it is placed after them in the Hebrew Bible, of which it forms the concluding book; and this no doubt points to the fact that it attained canonical distinction later than they. Nor is this unnatural. The book …
John Edgar McFadyen—Introduction to the Old Testament