Faidaen, Railag, and the map of Odin, one clan. Auto-translated

I've been trying for a very, very long time to find answers to these 3 questions. 1) Why in Heroes 5 did Freedom orcs, Faydaen, and other elite units not fight against Biara? 2) What happened to Railag? Why were we told that he went to kill the Dark Messiah, but when playing through the game from the perspective of the Dark Messiah, Railag is not present as an enemy... Did he die? Or did he just not make it in time? 3) On the map "Odin Khan, Odin Clan," I played with cheats and cheated myself to level 39, upgraded a Silent Stalker, and it turns out that on this map, right at the bottom, in the center, there's a group of heroes. They don't show themselves, you can't get to them, but they have an army, and all the races in the game are represented. What is this?

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I can send screenshots to anyone who can really help me understand the 3rd question.

1) The elves were unaware of what was happening, and they didn't care about anyone anyway; they are a selfish race. 2) The game developers simply forgot about it. They just removed it. Like, they couldn't find it. 3) Unclear.

These are ordinary scripted heroes who would gradually join the game if you played through the map as intended. As for Railag, he set out to find the Messiah, but failed. The reason why remains a mystery.