That went out to war by bands, i.e. some bands at one time, and some at another, as occasion required. See Poole on "1 Chronicles 27:1", See Poole on "2 Chronicles 13:14".
Related Commentaries of 2 Chronicles 26:11
2 Chronicles 26:11
11 Moreover Uzziah had an host of fighting men, that went out to war by bands, according to the number of their account by the hand of Jeiel the scribe and Maaseiah the ruler, under the hand of Hananiah, one of the king's captains.