Bing, per Wikipedia, traditional pemmican is 50/50 jerked meat (often bufalo) and animal fat, sometimes with dried berries added. The Tanka bar is dried buffalo meat (which I adore) and cranberries with some miscellaneous ingredients - no fat added, although 25 of its 70 calories are fat derived.

Epic makes a similar bar, but with added bacon fat. I don't think it is nearly as tasty.

Tanka bars were developed on the Pine Ridge Reservation, in South Dakota, where I have spent many memorable summers, so that is a plus for me. The name 'Tanka" is derived from the Lakota word for strong or powerful.