What was the favorite type of mule used in the Old West?

Paul Gordon St. Thomas, Ontario The mule of choice was the big Missouri Mule, known far and wide for its intelligence and stamina. I’m told the army used to stamp their mules with the “US” brand, which of course, stood for “Un safe.” Recalcitrant army mules, those known to kick without provocation, had their tails shaved. The term “shavetail” was later applied to young, impetuous second lieutenants who were still “wet behind the ears.” Marshall Trimble is Arizona’s official