He says in 2012 tribal leaders gave the National Park Service direction to establish a Tribal National Park. But landowners are upset.
"I hear the voices of people that believe their land is going to be taken and that is not the case. The land boundary will be identical to what it was in 1968 when Congress established the South Unit," said Brunnemann.
"I haven't heard anyone take the side of the federal government on this one. It is blatant land theft," said Bud May, a landowner.
Wednesday was the anniversary of Little Big Horn and tribal members say they thought it was fitting to do the protest on that day.