By Dick Sheldon| March 20, 2020 1:00 AM In 1859, 1st Lt. John Mullan Jr. engineered and built a road (trail) from Fort Benton, Mont., to Walla Walla, Wash., passing nearby the current location of Coeur d’Alene. Three years later, with the help of 200 soldiers and civilians, the 611-mile trail was completed. The lieutenant became Capt.…

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