US Army Alpha 1-19 Confidence Obstacle Course (COC) 

Confidence Obstacle Course
The Confidence Obstacle Course (COC) helps instill Army values, build confidence and raise personal courage between trainees. The Confidence Obstacle Course is designed to test trainee’s endurance, stamina and willpower to boost their confidence in their ability to perform under trying conditions.
The Confidence Obstacle Course is all about overcoming obstacles and, as the name implies, building confidence.
Red Phase - During Phase I trainees are subject to “Total Control,” meaning their every action is monitored and constantly corrected by demanding drill sergeants. The entire platoon may be punished for even minor infractions by a single trainee, the purpose being to foster a sense of common responsibility among the unit and to develop the type of attention to detail required of all soldiers.
This phase also includes physical readiness training, road marches, confidence building, and formation marching. Trainees also receive an introduction into Chemical Radioactive Biological and Nuclear (CBRN) readiness, which will include the proper usage of breathing masks.