2 Samuel 11:1
And it came to pass, after the year was expired, at the time when kings go forth to battle, that David sent Joab, and his servants with him, and all Israel; and they destroyed the children of Ammon, and besieged Rabbah. But David tarried still at Jerusalem.
Torrey's Topical Textbook—AKJV

2 Samuel 12:26-29
And Joab fought against Rabbah of the children of Ammon, and took the royal city.
Torrey's Topical Textbook—AKJV