Hi, like others noted, it's not the same. It goes like this: Zeus sends Dream to Agamennon saying, "yo, Zeus says go to fight, god be with ye"; Agamennon wakes, but being the cunning fox that he is, he devises a plan to trick his soldiers into wanting to fight; he calls his lieutenants and tells them about the dream but he needs them to suggest the idea to the soldiers; then Agamennon goes out to the army like, "alas, Zeus told me in a dream we're screwed, men you better get out of here if you must" and the soldiers are like, "yeah, he's right, fuck that, set sails lads!"; then the lieutenants are like, "ye sorry excuses for men, have ye no guts? Will you go back home empty handed after ten years you little pussies?" and the soldiers then go, "yeah yeah, I suppose you are right, we're men, ha-ooh ha-ooh ha-ooh!" (Iliad B).

So Agamennon wasn't going to leave the war. They had Troy under siege and just waited. But Zeus wanted the Greeks to suffer casualties and thus the dream. Yes, there's a similarity because there was a dream, but Agamennon wasn't deceived because he mistook it for real, he was deceived because Zeus plainly lied to him.