Knight Otu
First Post
I think the honor of largest battle goes to Manzanita's end of M2, with a ton of Sahuagin emerging from the waters. The end battle of Bastards of Bluerun, I seem to recall, was pretty big as well, and as Jdvn0 mentioned, Slaves of the Dragons is pretty big as well - 8 PCs, 11 NPC allies, summoned creatures, and an animal companion against around 16 kobolds, 1 kobold priest and 1 were-monitor sorcerer (the 'dragon').
But that coming battle of yours might take over.
But that coming battle of yours might take over.