Big Picture: OCS Fort Sill - National Archives and Records Administration - ARC Identifier 2569759 / Local Identifier 111-TV-521 - DVD Copied by Liz Pruszko - Department of Defense. Department of the Army. Office of the Deputy Chief of Staff for Operations. U.S. Army Audiovisual Center. (ca. 1974 - 05/15/1984). Since America's earliest days artillery firepower has played an important part in our national defense. In this issue THE BIG PICTURE takes its cameras to Fort Sill, Oklahoma, Artillery Center of the free world where the modern artilleryman is trained in both cannon and missile artillery. THE BIG PICTURE follows a young soldier through Fort Sill's Artillery and Missile Officer Candidate School. The latest training devices, equipment and weapons of conventional artillery are seen in this 30-minute film.