The Crucible on DVD. By definition, a crucible is a state of prolonged anguish and privation. As it relates to the making of Marines for the 21st century, it's boot camp's defining moment. This 54 hour event occurring near the end of recruit training features little sleep, little food, over 40 miles of forced marches and 32 stations that test physical toughness and mental agility. It is designed to build self-confidence, teamwork, trust in fellow Marines, positive peer pressure and emphasizes the core values of Honor, Courage, and Commitment.(50min) (1998). BONUS FEATURE: Soldiers of the Sea. This classic 1939 Marine Corps film shows the training of recruits at MCRD, San Diego and other highlights of life in the CORPS before World War II. Time approximate 17 minutes.