In the initial man-to-man fight he might have been some use but very vulnerable to arrows (no armor), in the subsequent lock-in he would be speared very easily. Ghost is even more stealthy then Grey Wind, though this is more clear in the books than the show, it really makes no sense for him to be in this open field battle. But even more, Grey Wind was not used ain direct combat but on a stealthy side mission to spook and thus cripple the opponent's cavalry. Battle of Oxcross: Again at night-time.The ensuing slaughter of the Lannister camp (offscreen) is also at night time and with surprise (most soldiers were sleeping). Also no archery that can take anything like a Direwolf out quite quickly. The opponents were not an organised wall, most fighting would consist of individual combat. Whispering woods: evening/night-time in a forest.Only Grey Wind has been used in battle, but again this fitted his strengths: In fact, any time a direwolf goes up against a decently sized force (Grey Wind at the twins, Summer at the weirwood tree) they're killed fairly quickly. Their main strength lies in speed, agility and overpowering single combatants, not in brute force. In almost all cases where we see a Direwolf fight succesfully it is versus a single opponent or small group(s) of scattered opponents. I am sure he would have done a lot of damage.Дirewolves are not war mounts and are certainly not trained for open field battle. That being said, I am fairly certain the following statement is incorrect.

Where he exactly was is not known with certainty as Ghost was last seen before Jon left Castle Black.

War times ghost gassistant ame