I'm curious about traditional Fry Bread after looking through recipes this morning. [View all]

I've never had it before, but from photos I'd thought it was like the Fried Dough Boys from food booths at the fair.
Now I see after looking through several recipes that the leavening is totally different! Instead of yeast it is baking powder. I don't know why, but I'm floored that it's not yeast! Can anyone tell me about the history of Fry Bread and how it came to be that it's not yeast-based? I'm so curious.