In May 1959, film rights to the book were bought by
producer Milton Sperling and his
United States Pictures Productions. In August, Charles Schnee was working on the script.
Sam Fuller Sperling approached the experienced
Samuel Fuller to write and direct
The Marauders (the
working title) in early 1961. Fuller was then attempting to have Warner Bros. finance and make his dream project,
The Big Red One (like Ogburn, influenced by his own WWII combat experience), and initially refused Sperling's offer.
Jack L. Warner summoned Fuller and told him that ''Merrill's Marauders
would be a dry run for his The Big Red One''. Fuller's connection to the project was announced in November 1960. For the lead role, Fuller wanted
Gary Cooper, but Cooper felt that he was too old for the role. Fuller told Cooper that he would be writing the script, and that he felt Cooper was "perfect" for the part and "saw only him as my Merrill." Fuller recounted in his memoir that the real Merrill, was a "tough father figure with a commanding presence and an iron will," and that with Cooper in the role it would serve as a tribute to Fuller's commander in World War II, General
Terry Allen, who would "always be there for his men." After Cooper declined the role, Fuller was impressed with former
Universal Pictures contract star Jeff Chandler and cast him.
Script Samuel Fuller and Milton Sperling simplify, but follow the events and narrative of Ogburn's historical account, but they use the character structure of Denis and
Terry Sanders's
screenplay for
The Naked and the Dead; an earnest young
lieutenant "Stock" in command of a
military intelligence and
reconnaissance platoon is a mediator between his men and a fatherly
Brigadier General Frank Merrill. The screenplay also features a grave
medical officer, "Doc", continually briefing Merrill on the physical and psychological condition of the men and on Merrill himself. Fuller structured the script differently than his previous films, with little dialogue, combining "lots of quick shots to capture the raging storm of combat." In recounting how he showed the true-life heart condition of Merrill, Fuller pointed out that soldiers sometimes die of heart failure, "without a scratch" due to the emotional toll of combat, and "I wanted this movie to be truthful about it." One of the scenes of which he was most proud had no dialogue and showed the tough, bearded Sergeant Kolowicz breaking down in tears after being fed rice by an elderly woman ==Shooting==