The social impacts of technology must never be underestimated or ignored.
"There also was a social impact of air mobility, though not one understood well at the time. In earlier Pacific wars, soldiers returning from war might have weeks of emotional decompression during their sea voyages back to the States. [...] Soldiers leaving Vietnam might walk away from their fighting holes one morning, catch a 'freedom bird' the next afternoon, arrive in the states the following evening, and be demobilized and on the street a day later. The stress of such abrupt transitions was not mitigated later in the war, when the new civilians, with their obvious military haircuts, often were subject to verbal and even physical abuse from fellow citizens opposed to the war."
-Robert C. Owen, p. 189, "Vietnam", Air Mobility