What does 2 Chronicles 26:13 mean?

He built towers in the wilderness, and dug out many cisterns, for he had much livestock; in the lowland also, and in the plain. He had farmers and vineyard keepers in the mountains and in the fruitful fields, for he loved farming.

Moreover Uzziah had an army of fighting men, who went out to war by bands, according to the number of their reckoning made by Jeiel the scribe and Maaseiah the officer, under the hand of Hananiah, one of the king’s captains.

The whole number of the heads of fathers’ households, even the mighty men of valor, was two thousand six hundred.

Uzziah prepared for them, even for all the army, shields, spears, helmets, coats of mail, bows, and stones for slinging.

In Jerusalem, he made devices, invented by skillful men, to be on the towers and on the battlements, with which to shoot arrows and great stones. His name spread far abroad, because he was marvelously helped until he was strong.

But when he was strong, his heart was lifted up, so that he did corruptly, and he trespassed against Yahweh his God; for he went into Yahweh’s temple to burn incense on the altar of incense.