First, they referred to the retaliation against Afghanistan and the Taliban as a "crusade".
Now, they're engaged in a quagmire of a war in South Asia to which there appears to be no end and no graceful way of exiting.
Even the rhetoric is echoing Vietnam.
"America is committed to the defense of South Vietnam until an honorable peace can be negotiated," Johnson told the Tennessee Legislature on March 15, 1967. Despite the obstacles to victory, the president said, "We shall stay the course."
After 14 Marines died in a roadside bombing on Aug. 3, Bush declared: "We will stay the course, we will complete the job in Iraq. And the job is this: We'll help the Iraqis develop a democracy."