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Photos and Text via David Haugh - Content Editor
In June 1915, Col. Royal Davidson and 30 cadets from the Northwestern Military Academy in Highland Park, Illinois drove an armored Davidson-Cadillac and seven support vehicles from Illinois to the Panama Pacific International Exposition being held in San Francisco, California. Although plagued by rain for much of the trip, 34 days after their start all eight vehicles arrived at the Exposition. Having achieved his goal of demonstrating that a mechanized army was in the future, the cars were shipped back by train rather than covering the distance again under their own power.