It seems as if Hermes helped Zeus and other gods who sided with the Trojans in the war. What was his reason?
Hermes, along with some of the other gods, was more or less dragged into the war, with no actual interest for either side. He allowed his direct Trojan opponent, Leto (mother of Artemis and Apollo), to beat him in battle. However, Hermes had a great interest in Odysseus, who was a descendant of his son Autolycus. But generally, he didn’t favor either side. Technically you could say he sided with the Greeks, but with no actual opinion on the war itself. It could also be that Zeus is his father, but I wouldn’t count on that particularly.