May 28, 2026
The Osage Nation is appealing to the Tenth Circuit an Oklahoma federal judge's decision that declined to vacate a 16-year-old circuit decision saying the tribe's reservation boundaries had been disestablished, arguing that no congressional language explicitly changed those boundaries.
March 03, 2026
An Oklahoma federal judge has denied a bid by the Osage Nation for an order that would vacate a decades-old Tenth Circuit decision that determined its reservation boundaries had been disestablished, saying the district court is no longer active in the case and must continue to rely on precedent.
March 28, 2025
An Oklahoma federal judge will allow the United States to weigh in on a dispute between the Osage Nation and the state's tax commission over the tribe's reservation boundaries after the federal government said a U.S. Supreme Court ruling at the crux of the litigation is of interest to the government.
February 24, 2025
Oklahoma Tax Commission officials are urging a federal district court to dismiss a motion by the Osage Nation that seeks acknowledgment of its reservation's continued existence, arguing that the decades-old case arises out of the tribe's attempt to avoid state taxation of its members.
January 07, 2025
The Osage Nation has urged an Oklahoma federal court to acknowledge its reservation's continued existence, arguing that a conclusion the Tenth Circuit reached 15 years ago saying the tribe's boundaries were disestablished was based entirely on extratextual factors.