Some interesting Court of Claims cases, these only go back to 1997 on the web:
1. Harvest Institute vs US (this is the Freedmen case in the Court of Claims)
Court dismissed the action for lack of jurisdiction, failure to state a claim and outside the statute of limitations. The court states any obligation the US had was at the turn of the century (I assume that was the 1900s)
2. UKB vs US and Cherokee Nation
This case is in reference to the Arkansas River Bed settlement
3. Osage Tribe vs US
US Constitution recognizes tribes as sovereign nations in Article 1 section 8.