The red nighties are pretty inaccurate (the Spartans wore red capes and armour), but the Spartan helmets are the same in EB as they are in RTW.
The screeching women are actually somewhat accurate, since the women actually followed the Germanic warriors both during the campaign and battles. The women would stay right behind the men in a battle, and whenever the men would rout or retreat, the women would taunt them, usually succeeding in rallying the men. I am not so sure if the women actually "screeched" or taunted/encouraged during the other parts of the battle though. Chances are they did, at least once in a while. Acting as CA, it would be more accurate to give the screeching women a version of the "Rally" ability.
Despite this, turning the Germanic women into a Total War unit is taking it pretty far, although not necessarily ahistorical.
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