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John Coffee Hays, without formal training, developed tactical combat concepts that are still used today. Hays’ philosophy of giving men superior weapons, training them well, and utilizing speed and audacity on the battlefield would be adopted later by another Californian, George Patton.
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Dan Marcou (Law Dogs: Great Cops in American History)
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They met their comrades, who had been badly cut up, and, deciding that the Rangers were too good for them, withdrew. Wild cheers welled from the crater of " Enchanted Rock," and loud were the hurrahs for Texas Jack, the gallant and intrepid Ranger. The war with Mexico found Captain Jack Hays ready
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Charles H.L. Johnston (Captain Jack Hays: Adventures of John Coffee Hays, Famous Leader of the Texas Ranger and Sheriff of San Francisco County, California (1913))