Then the priest gave to the commanders of hundreds the spears and shields of King David from the house of the LORD.
Six years Athaliah tyrannised. We have not a particular account of her reign; no doubt it was of a piece with the beginning. While Jehu was extirpating the worship of Baal in Israel, she was establishing it in Judah, as appears, Ch2 24:7.
Commenting on 2 Kings 11:4-12
And to the captains over hundreds did the priest give King David's spears and shields, that were in the temple of the Lord. Such as he had taken in war from his enemies, and had dedicated for the service of the temple, to defend it on occasion, and laid up there; those the priests gave to the captains, to arm their men with, who came...
And to the captains over hundreds did the priest give king David's spears and shields, that [were] in the temple of the LORD. (k) That is, Jehoiada.