Afghanistan and Vietnam

Vietnam: Who was right about what went wrong – and why it matters in Afghanistan - Salon.com: 

In the Vietnam era, as today, the United States found itself engulfed in a seemingly never-ending war with mounting costs, unclear goals and few signs of success. In both Vietnam and Afghanistan, successive presidents faced much the same options: Withdraw, decisively escalate or do just enough to avoid losing. Like his predecessors in both wars, Trump chose the middle path – incremental escalation with no clear exit plan. Although Trump called it a “plan for victory,” Secretary of State Rex Tillerson candidly admitted that the additional American troops will likely do little more than “stabilize the situation.”