NET

1 In the spring of the year, at the time when kings normally conduct wars, David sent out Joab with his officers and the entire Israelite army. They defeated the Ammonites and besieged Rabbah. But David stayed behind in Jerusalem.

Darby

1 And it came to pass, at the return of the year, at the time when kings go forth, that David sent Joab, and his servants with him, and all Israel; and they laid waste the [land of the] children of Ammon, and besieged Rabbah. But David abode at Jerusalem.

KJV

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.