2 Samuel 11:16,17

Where he knew that valiant men were He ordered him, with others, to attack a part of the city which he knew would be valiantly defended; or out of which he knew the best men they had in the city would issue forth against them. Joab also was herein very guilty in complying with David's wicked command; unless he supposed that Uriah had committed some great crime, for which David consulting his honour, chose to punish him in this manner, rather than openly. The men of the city went out

They seem to have made a sally out of the city upon the Israelites, when they saw the latter were preparing for an assault. There fell some of the servants of David This was a further aggravation of David's sin, that he not only exposed an innocent and a valiant faithful servant to be killed, but other persons also with him, who might otherwise have lived to have done good service to their country. For it is not to be imagined that David meant Uriah to be set alone in the fore-front of the battle, where the service was hottest, but that there was to be a party with him, whom he was to lead on. This was accordingly ordered by Joab, and those men fell with Uriah.