"In 1966 the U.S Army, shaken by it experience in Viet Nam transformed itself. By 1972 the Army had changed its doctrine, tactics, uniforms, organization, training and equipment to deal with the challenges of the complex environment of South East Asia and Global Wars of National Liberation. Driven by ideological, fiscal, and political necessity after the fall of Saigon in 1975, the Army reverted to its 'default' organization and doctrine to face the Soviet threat based on the assumption that these lesser 'low intensity' problems could be handled by a few special units and ad hoc responses. About 25 years later, the U.S. Army faced a complex environment that tested these assumptions. In 2010, in response to the ongoing conflict in Iraq and Afghanistan, the U.S. Army and the Joint Force is in the process of modifying its doctrine, tactics, uniforms, organization, training and equipment to deal with the challenges of the complex environments of the Middle East, the Balkans, Africa, and Asia. Again, driven by ideological, fiscal, and political necessity, what will the US Army and Joint Force do to address its Global Responsibilities beyond the crisis in Iraq and Afghanistan?"
Peacekeeping and Stability Operations Institute: http://pksoi.army.mil/