User blog comment:Lily8763cp/Tale From the Past - The Fire and Ice Conflict/@comment-5891510-20160921205053/@comment-5760976-20160921225549

Snow Pea, Frostbolt and Torchwood all left out of concern, but nobody knew that the Ice Queen Pea was going to be attacked.

Though I didn't mention it, but some of the Fire Army was already attacking the Ice Kingdom, as some fire plants tried to light Torchwood up, so they were stuck fighting there. But you can assume some got to the castle after she was saved.