8 May issue of the Weekly Standard - No More Vietnams by David Gelernter.

... The Vietnam analogy has been part of the Iraq war story since the fighting started (in fact, since before it started). The Bush administration often deals with its critics by ignoring them. This time it can't. Too much rides on the president looking these critics in the eye and telling them: Damned right this is Vietnam all over again. Only this time we will not get scared and walk out in the middle. This time we will stand fast, and repair a piece of the American psyche that has been damaged and hurting ever since we ran from Vietnam in disgrace way back in April 1975.

Of course any citizen is welcome to criticize the conduct of any war--tactfully, without giving aid and comfort to the enemy. Maybe we are doing things all wrong in Iraq. But those who launch the Vietnam analogy at the administration are lobbing heavy artillery for a different reason. They are predicting (with obnoxious schadenfreude) that Iraq will turn out like Vietnam in the end: We will proclaim ourselves beaten, give up, and go home. The sooner we understand this, the sooner we will do the intelligent and humane thing and surrender...

Not many nations get a second chance to show the world and themselves that they are serious after all, that their friends can trust them and their enemies ought to fear them. There is no way we can atone for the blood and death we inflicted (indirectly) on South Vietnam by abandoning it to Communist tyranny. That failure can never be put right. But we can make clear that "No More Vietnams" is a Republican slogan. It means that we will never again go back on our word and betray our friends, our soldiers, and ourselves....

Most wars bog down in hard fighting at some point or other. When that happens, America must be able to trust itself not to run away. George Washington and his men did not run away after General Howe took Philadelphia for the British in September 1777, and Washington's counterattack on Germantown failed in October, and the brand new American army had to settle into miserable, freezing winter quarters at Valley Forge. Every American schoolchild used to know what Valley Forge meant: Stand firm and fight, no matter how terrible things are. The Union army did not run away in the fall of 1862, although Lee and Jackson had won a huge Confederate victory at Second Bull Run, and Lee had crossed the Potomac into Maryland and was threatening Washington, Baltimore, and (again) Philadelphia, and was expected to capture all of Maryland and a crucial railroad bridge in Pennsylvania--which would just about cut the Union in two. But Lincoln and the Union did not give up.The Confederates didn't run away either. Their cause was wrong, but they stood up heroically and fought till they were crushed to bits.

Nor did the American army run away 80 years later in the spring of 1942, although the Pacific fleet had been smashed at Pearl Harbor, Manila had been evacuated, Bataan had surrendered after a desperate, starving defense--and then Corregidor had surrendered too. But MacArthur promised that Americans would return to liberate the Philippines, and that's just what happened...

Those that think that "no more Vietnams" means that cowardice is the better part of wisdom don't know their Vietnam history either. There are many important lies in circulation about Vietnam, like counterfeit $50 bills that keep resurfacing. Those who held these views during the war itself weren't liars; in most cases they were telling the truth as they understood it. But decades later, it requires an act of will to keep one's ignorance pristine...
Much more, follow the link above and read on...