Following are a number of back-translations as well as a sample translation for translators of 1 Chronicles 20:1:

• Kupsabiny: “In the days/time when kings went for battle each year, Joab went with the soldiers of Israel to raid the Ammonites. But David remained in Jerusalem. Joab surrounded the city of Rabbah and destroyed it.” (Source: Kupsabiny Back Translation)
• Newari: “In the spring, Joab took the army of Israel out to battle. This is the time when kings go out to battle. Israel’s army attacked the land of the Ammonites. King David, however, stayed in Jerusalem. Having attacked the city of Rabbah, they besieged it. And [they] destroyed it completely.” (Source: Newari Back Translation)
• Hiligaynon: “At the time that the kings go to war, Joab led the soldiers to fight. David on-the-other-hand stayed in Jerusalem. Joab and company destroyed the land of the Ammonhon. Then they besieged Raba until they had-destroyed it.” (Source: Hiligaynon Back Translation)
• English: “In that region, kings usually went with their armies to fight their enemies in the springtime/when the cold season ended. But that year, David did not do that. Instead, he stayed in Jerusalem, and he sent his commander Joab to lead the army. Joab took his troops. They crossed the Jordan River and ruined the land of the Ammon people-group. Then they went to Rabbah, the capital city, and surrounded it. David stayed in Jerusalem for a while. But later he took more troops and went to help Joab. Their armies attacked Rabbah and destroyed it.” (Source: Translation for Translators)