John Slaughter was an Arizona lawman, rancher, cowboy, and a hard-to-beat poker player. Born in 1841 on a Southern plantation in western Louisiana, he went to Texas where he learned how to herd cattle and speak Spanish as he worked with the Mexican vaqueros (cowboys). In the early 1860s Slaughter protected European settlers against hostile Comanche native Americans as a Texas Ranger. He fought on the Confederacy side during the Civil War. At the age of 41, he decided to start ranching in Arizona purchasing the San Bernardino Rnach on the U.S.-Mexico boarder near Douglas, Arizona.
It was here where he became legendary as a lawman and a prominent poker player.