Several months ago, Godfrey says, retired Col. Carl L. Sitter of Richmond recounted the 1950 battle of Chosin Reservoir in Korea for 110 reservists at Camp Upshur in Quantico. Sitter won a Medal of. The United States Marine Corps Officer Candidates School (OCS) is a training regiment designed to screen and evaluate potential Marine Corps Officers.Those who successfully complete the period of instruction are commissioned as Second Lieutenants in the…