Under the watchful eye of an Officer Candidates School staff member, Officer candidates from Echo Company negotiate The Quigley, one of the obstacles making up the Combat Course, at OCS on June 7, 2013. The Quigley is an obstacle that includes maneuvering cement culverts, logs and barbed wire. - Under the watchful eye of an Officer Candidates School staff member, Officer candidates from Echo Company negotiate The Quigley, one of the obstacles making up the Combat Course, at OCS on June 7, 2013. The Quigley is an obstacle that includes maneuvering cement culverts, logs and barbed wire.