The Wham Paymaster Robbery (/ˈhwɑːm/ WHAHM) was an armed robbery on a United States Army paymaster transporting over US$28,000 in gold and silver coins (about $744,000 in present-day terms) and his escort that occurred on May 11, 1889. Major Joseph W. Wham was transporting a payroll from Fort Grant, Arizona Territory to Fort Thomas when he and his escort of eleven Buffalo Soldiers were ambushed.