victory over a very great army

"victory over the much larger army of Judah"

In this way the Arameans brought judgment on Joash

This refers to God's judgment. This can be stated as an action. Alternate translation: "In this way God used the Arameans to judge Joash" (See: rc://en/ta/man/jit/figs-abstractnouns and rc://en/ta/man/jit/figs-explicit)