As in Vietnam, this mission is all about us. And as in Vietnam, the US escalation has the possibility of causing much broader destabilization in Central and South Asia and the Middle East. Perhaps, as Bill Moyers powerfully demonstrated about Lyndon Johnson and the Vietnam War buildup,
the current momentum for escalation may reside in the president's fear of right-wing attacks if he shows "weakness" by denying the generals' request for more troops. Tellingly, and disastrously, Johnson knew that escalation in Vietnam would not succeed yet he saw no alternative to escalation because he feared a perception that he was weak vis-à-vis the communist threat.
http://www.huffingtonpost.com/jeffrey-sachs/the-surrealism-of-the-afg_b_382281.html