Because what we have here, folks, is Vietnam. A war that we will not win, which we seem to still be in only because of the hubris of our own bloated government.
I mean, really. I was listening to a program about tapes from the 1960s that were recently declassified where Lyndon Johnson is on the phone/meeting with different high level military people and I was astounded by the influence of the “we cannot appear weak” reasoning for staying involved in Vietnam. It made me a little sick to my stomach. Does anyone really think another country would say to themselves, “well, the U.S. can’t win in Vietnam/Afghanistan/etc. so we should go invade them because obviously they can’t defend themselves.”