Since 1951, the Marine Corps Mountain Warfare Training Center has trained Marine, joint and coalition forces how to more effectively operate in complex and compartmentalized terrain at medium-to-high altitudes in a multitude of weather conditions. - Since 1951, the Marine Corps Mountain Warfare Training Center has trained Marine, joint and coalition forces how to more effectively operate in complex and compartmentalized terrain at medium-to-high altitudes in a multitude of weather conditions.