In January 1842, a British column of 4500 soldiers and 16,000 civilians, including women and children of the soldiers' families, sought to leave Afghanistan for British India through snowy mountain passes where they were repeatedly ambushed by Afghan guerrillas. In the end, only one survivor, Dr. William Brydon, escaped. The British tried again to conquer Afghanistan in 1878-80 but finally gave up in 1919.

In February, 1989, the Soviet Union retreated from Afghanistan to the north after having deployed 620,000 soldiers there over ten years, on average about 100,000 at a time. Of that total, 14,450 were killed in action or died of other causes while 469,685 were wounded or fell ill. The strain on the Soviet economy and armed forces was among the causes of the collapse of the Soviet Union in 1991.

Today, the US is plunging into a full-scale war in Afghanistan not unlike the British and Russians earlier. The war in Afghanistan, literally halfway around the world from the US, has become President Barack Obama's war just as Iraq was President George W. Bush's war. And it promises to be equally contentious.

The president set the course three months ago when he noted that the US had deployed to Afghanistan to attack the al-Qaeda terrorists and Taliban extremists shortly after 9/11. Now, he said: "What is our purpose in Afghanistan?" His answer: "If the Afghan government falls to the Taliban -- or allows al Qaeda to go unchallenged -- that country will again be a base for terrorists who want to kill as many of our people as they possibly can."

"We are in Afghanistan to confront a common enemy that threatens the United States, our friends and our allies, and the people of Afghanistan and Pakistan who have suffered the most at the hands of violent extremists," he said. The president asserted that he had "a clear and focused goal: to disrupt, dismantle and defeat al Qaeda in Pakistan and Afghanistan, and to prevent their return to either country."

So far, however, polls this month show the president has not aroused much public enthusiasm for the Afghan war. One poll said 50 percent of Americans favored the war while 48 percent opposed it. Another survey found that 66 percent considered the economy, jobs, and government spending the nation's top priorities while only nine percent thought the wars in Iraq and Afghanistan were necessary.

Even in the president's own Democratic Party, skepticism abounds. During a hearing on Capitol Hill, Representative Jim McGovern, a Massachusetts Democrat, contended that Obama's troop buildup in Afghanistan would only make it harder to withdraw from a war that lacks a "clearly defined mission." By this fall, the US will have 68,000 troops in Afghanistan with no exit promised or in sight.

Bloomberg News quoted McGovern: "I wish the current administration would do in Afghanistan what I asked the previous administration to do in Iraq: And that is to simply put forth a clearly defined policy, a clearly defined mission -- it's not a radical idea," McGovern said. "I am tired of wars with no exits, no deadlines and no end."

Active and retired military officers have privately questioned whether the cost in blood and treasure, even in the relatively low level of fighting in Afghanistan so far, has served the national interest. As of this week, 708 American military people have been killed and 3063 wounded. The Center for Defense Information, a non-government research institute, estimates that Afghanistan has cost $440 billion since 2001.

With all of the issues confronting the US today, said one critic: "Afghanistan is a fool's errand. It is a money pit. Most importantly, it is unworthy of our young warriors' lives as our vital security interests do not abide there."