Cheyenne & Arapaho Tribes — Ransomware Incident Claimed by Rhysida
- Victim: Cheyenne & Arapaho Tribes
- Claimed by Rhysida
- Date claimed: 2026-02-17
- Country: US
- Sector: Public Sector
Cheyenne & Arapaho Tribes The Cheyenne and Arapaho Tribes are a federally recognized united nation of two distinct peoples-the Tsistsistas (Cheyenne) and Hinono'ei (Arapaho)-with a historic alliance formed in the early 19th century.