The Doubleday myth is the claim that the sport of baseball was invented in 1839 by future American Civil War general Abner Doubleday in Cooperstown, New York. In response to a dispute over whether baseball originated in the United States or was a variation of the British game rounders, the Mills Commission was formed in 1905 to seek out evidence. Mining engineer Abner Graves authored a letter claiming that Doubleday invented baseball. The letter was published in a newspaper and eventually used by the Mills Commission to support its finding that the game was of American origin. In 1908, it named Doubleday the creator of baseball.