In January 1940, William J. Donovan sat in a Manhattan radio studio plugging “The Fighting 69th,” a Hollywood movie about the cocky, mostly Irish New York regiment whose exploits during World War I had made Donovan a national hero and earned him the Medal of Honor. The release of the film, starring James Cagney and Pat O’Brien, with George Brent as the rakishly handsome Donovan, put the then wealthy and well-connected corporate attorney back in the spotlight just at the moment President Franklin Roosevelt was looking for men who could help mobilize the country for war.