Militarism was the key cause to almost every war in human history (such as both World Wars). Because the North Vietnamese, or the Viet Cong, were sizing up their armies, the South Vietnamese and the Americans then saw that as a threat to the stability of South Vietnam. They then sized up their armies and the war started due to the Viet Cong increasing the size of their armies.
Medical training I believe
In the scenario in which the first run distribution that can best be characterize as the marketing of films for theaters screening which is the answer. It is a part of the film production. Hope this is the best answer and would be of great help.
