Nah. We just don't like Yankees.
We had to cancel the local re-enactment of the Civil War Battle Of Fort Blakeley because no-one would volunteer to be Union troops (Yankees).(ahem)
Hahaha.
Local group had to do the same thing because no one wanted to be the Rebels.
Funny thing, the reenactment group back home had no problem having people playing the Sioux. And to be honest, the bluecoats and the local Tribes fought each other much worse than the North and South.