Speaking to the Veteran’s of Foreign Wars National Convention, George Bush ushered up some powerful examples from history to explain why America should not lose sight of victory in Iraq and Afghanistan. In a break with past avoidance of any comparison to Vietnam, President Bush takes it square on:

Three decades later, there is a legitimate debate about how we got into the Vietnam War and how we left. There’s no debate in my mind that the veterans from Vietnam deserve the high praise of the United States of America. (Applause.) Whatever your position is on that debate, one unmistakable legacy of Vietnam is that the price of America’s withdrawal was paid by millions of innocent citizens whose agonies would add to our vocabulary new terms like “boat people,” “re-education camps,” and “killing fields.”

There was another price to our withdrawal from Vietnam, and we can hear it in the words of the enemy we face in today’s struggle — those who came to our soil and killed thousands of citizens on September the 11th, 2001. In an interview with a Pakistani newspaper after the 9/11 attacks, Osama bin Laden declared that “the American people had risen against their government’s war in Vietnam. And they must do the same today.”

His number two man, Zawahiri, has also invoked Vietnam. In a letter to al Qaeda’s chief of operations in Iraq, Zawahiri pointed to “the aftermath of the collapse of the American power in Vietnam and how they ran and left their agents.”

Zawahiri later returned to this theme, declaring that the Americans “know better than others that there is no hope in victory. The Vietnam specter is closing every outlet.” Here at home, some can argue our withdrawal from Vietnam carried no price to American credibility — but the terrorists see it differently.

We must remember the words of the enemy. We must listen to what they say. Bin Laden has declared that “the war [in Iraq] is for you or us to win. If we win it, it means your disgrace and defeat forever.” Iraq is one of several fronts in the war on terror — but it’s the central front — it’s the central front for the enemy that attacked us and wants to attack us again. And it’s the central front for the United States and to withdraw without getting the job done would be devastating. (Applause.)

If we were to abandon the Iraqi people, the terrorists would be emboldened, and use their victory to gain new recruits. As we saw on September the 11th, a terrorist safe haven on the other side of the world can bring death and destruction to the streets of our own cities. Unlike in Vietnam, if we withdraw before the job is done, this enemy will follow us home. And that is why, for the security of the United States of America, we must defeat them overseas so we do not face them in the United States of America. (Applause.)

Recently, two men who were on the opposite sides of the debate over the Vietnam War came together to write an article. One was a member of President Nixon’s foreign policy team, and the other was a fierce critic of the Nixon administration’s policies. Together they wrote that the consequences of an American defeat in Iraq would be disastrous.

Here’s what they said: “Defeat would produce an explosion of euphoria among all the forces of Islamist extremism, throwing the entire Middle East into even greater upheaval. The likely human and strategic costs are appalling to contemplate. Perhaps that is why so much of the current debate seeks to ignore these consequences.” I believe these men are right.

In Iraq, our moral obligations and our strategic interests are one. So we pursue the extremists wherever we find them and we stand with the Iraqis at this difficult hour — because the shadow of terror will never be lifted from our world and the American people will never be safe until the people of the Middle East know the freedom that our Creator meant for all. (Applause.)

I recognize that history cannot predict the future with absolute certainty. I understand that. But history does remind us that there are lessons applicable to our time. And we can learn something from history. In Asia, we saw freedom triumph over violent ideologies after the sacrifice of tens of thousands of American lives — and that freedom has yielded peace for generations.

Peter Rodman explains why Bush’s history lesson correctly Assesses the consequences of defeat in Iraq for American global posturing.

So the president has his history right. The outcome in Indochina was not foreordained. Congress had the last word, however, between 1973 and 1975.

The strategic consequences of defeat in Indochina were also serious. Leonid Brezhnev crowed that the global “correlation of forces” had shifted in favor of “socialism,” and the Soviets went on a geopolitical offensive in the third world for a decade. Demoralized allied leaders in Europe as well as Asia feared the new Soviet aggressiveness and lamented the paralysis of American will. When Saddam invaded Kuwait in 1990, he and his colleagues invoked Vietnam as evidence that U.S. warnings did not need to be taken seriously. That’s what it means to lose credibility. Once lost, it has to be re-earned the hard way.

No analogies are ever complete, but — given our global leadership and the number of allies and friends that rely on us for their security — the consequences of an American defeat can be counted on to be terrible. How can anyone seriously think otherwise?