On this episode of Our American Stories, George O'Brien became one of Hollywood's biggest leading men after starring in John Ford's 1924 silent epic The Iron Horse. But long before Hollywood made him famous, O'Brien had already served in the Navy during World War I, and when Pearl Harbor brought America into World War II, the 41-year-old husband and father volunteered to serve again.

As part of our ongoing Hollywood Goes to War series, Roger McGrath, author of Gunfighters, Highwaymen, and Vigilantes: Violence on the Frontier, shares the astonishing story of how O'Brien went from silent-film star to Navy beachmaster, serving under fire at Attu, Saipan, and Leyte before returning once more to uniform during the Korean War.

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