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Columbia kept insisting upon placing its hottest new star Larry Parks in swashbucklers, and though Parks wasn't really suited to the genre, he always strived to please. Set in 17th-century France, the film stars Parks as Lt. David Picard, a peace-loving officer who is nevertheless handy with his sword when the need arises. Hoping to crush the burgeoning pacifistic movement in France, warmongering Marshall Mordore (Victor Jory) plots to abduct popular "people's general" Cadeau (George Macready, in a rare sympathetic role). Picard, Cadeau's adjutant, spends the balance of the film trying to shield the general from harm -- and to romantically pursue beautiful spy Nanton de Lartigues (Marguerite Chapman). The antiwar philosophies of The Gallant Blade would return to haunt Larry Parks when he was called to testify before the House Un-American Activities Committee.