With the U.S. Marine Corps's fight for life at the Battle of Chosin Reservoir against the Chinese Communist Forces offensive in the winter of 1950 being anxiously followed in the news of the day, Warner Brothers submitted a proposal on 7 December 1950 to the Marines to make a film about the events. The Marines approved the request, with former Marine Milton Sperling producing and co-writing the film for his United States Pictures division of Warners. The Marine Corps worked closely with Sperling on the script giving it their approval in August 1951 and agreeing to six weeks of filming at Camp Pendleton where the film crew bulldozed a road and sprinkled the area with gypsum to simulate snow. The Marines also created accurate Korean villages for the film. Commandant of the Marine Corps Lemuel Shepherd estimated the value of the Marine cooperation at US$1,000,000. The Hollywood Production Code Office originally refused to approve the title because of its ban on the word "hell", but changed their mind after requests from the Marine Corps. The film was also intended to showcase the diverse background of the Americans. Richard Carlson was a Norwegian-American from Minnesota, and so his character was given the last name "Hansen" (the most common surname in Norway), and Nedrick Young's character is given the name "Sergeant Novak", with Novak being a name of Slovak origins and Frank Lovejoy having the Anglo name Corbett. While the film uses fictional characters, it faithfully follows the true story of the First Marine Battalion's battles at Inchon and Seoul and is therefore ranked as one of the most realistic movies ever made about the Korean War.