As you can easily see, these tribes are "unfinished", that is, they are missing female leaders. I suppose that the designers of the game wanted to include these tribes but dropped them and left them in as an idea for any tribe-changing. I included both (replacing Sioux and Celts) with the leaders for the Incas being Atawallpa and Cusi Chimpu, and the leaders for the Arabs being Mohammed and Sheherazade (thus replacing the "Persian" Sheherazade with Atossa).
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Follow the masses!
30,000 lemmings can't be wrong.
We who grew up tall and proud
In the shadow of the mushroom cloud
Convinced our voices can't be heard
We just want to scream it louder and louder:
"What the hell are we fighting for?"
"Just surrender and it won't hurt at all"
-Brian May (Queen)
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