What does 2 Samuel 10:2 mean?

David thought, 'I should show kindness to Hanun, just like his father showed kindness to me.' So David sent some men to express his sympathy to Hanun about his father. But when David’s men arrived in Ammonite territory, 2 Samuel 10:2 - Modern Text Bible

(David wants to keep a good relationship with the new king, so he sends people to offer condolences, which was a diplomatic gesture.)