John Gill Commentary 2 Samuel 11:18

"Then Joab sent and told David all the things concerning the war;" — 2 Samuel 11:18 (ASV)

Then Joab sent
Messengers to David, as soon as Uriah was killed:

and told David all the things concerning the war ;
how the siege had been carried on; what success they had had, good or ill; what their advantages and disadvantages; what men they had lost, and especially in one sally of the enemy upon them, for the sake of which the express was sent.