The feud was originally fought between the Tewksburys and the Grahams against the well - established cattleman James Stinson .
It soon involved other cattlemen associations , sheepmen , hired guns , cowboys and Arizona lawmen .
Although the feud was originally fought between the Tewksburys and the Grahams against the well - established cattleman James Stinson , it soon involved other cattlemen associations , sheepmen , hired guns , cowboys and Arizona lawmen .