The Utah War is a pivotal episode in the history of the American West. For those crossing the overland trails in 1857, it meant cold camps, political suspicion, and constant fear of attack. One of the most vivid firsthand accounts comes from a civilian teamster named William Clark, whose memoir captures the uncertainty and danger as Johnston’s Army advanced toward Salt Lake City under mounting tension and disrupted supply lines. In this interview, historians William P. MacKinnon and Kenneth L. Alford explore Clark’s remarkable journey—and what it reveals about the Utah War.