<br/> <span>The <a href="https://www.thenationalnews.com/world/the-americas/biden-pledges-imminent-end-to-us-military-campaign-in-afghanistan-1.1203869">withdrawal of US troops from Afghanistan by September 11</a> will end </span><span>America's longest war exactly two decades after </span><span>the Al Qaeda terror attacks that triggered it.</span><br/> <span>In that time, more than 2,300 US military personnel </span><span>lost their lives in Afghanistan, while more than 20,000 </span><span>were wounded in action.</span> <span>Afghan civilians </span><span>have faced an even higher toll</span><span>: a UN </span><span>report last year estimated that 35,518 civilians were killed between </span><span>2001 and </span><span>2019.</span> <span>The Pentagon says it has spent nearly $825 billion on operations in the country.</span> <br/> <span>The war bega</span><span>n with the US-led invasion on October 7, 2001, in pursuit of Al Qaeda's leadership who were being sheltered by the </span><span>fundamentalist Taliban regime, which seized power in 1996.</span> <span>Operation </span><span>Enduring Freedom</span><span>, launched by then-president George W Bush, opened a military front in the US </span><span>W</span><span>ar on T</span><span>error</span><span> and toppled the Taliban within weeks.</span> <span>By November 2001, there were about 1,000 American soldiers in Afghanistan, </span><span>increasing to 10,000 the following </span><span>year.</span> <span>But attention was diverted from Afghanistan when the US</span><span> invaded Iraq in 2003 to oust dictator Saddam Hussein</span><span>.</span> <span>The Taliban and other extremist groups </span><span>were able to regroup </span><span>in southern and eastern Afghanistan, from where they could easily travel to and from </span><span>bases in Pakistan's tribal zones </span><span>and </span><span>wage an insurgency.</span> <span>In 2008, Mr Bush sent </span><span>more soldiers, raising their number</span><span> to about 48,500, after the US command in Afghanistan called for more manpower</span><span>.</span> <span>Barack Obama, his successor, was elected to office that year on promises to end the wars in Iraq and Afghanistan</span><span>. He boosted the size of t</span><span>he force </span><span>to about </span><span>68,000 in 2009.</span> <span>In December 2009, he sent in another 30,000 soldiers in an attempt to stem the growing Taliban insurgency and to </span><span>support Afghan institutions.</span> <span>By 2010, the US-led Nato force in Afghanistan numbered more than 150,000 soldiers</span><span>, </span><span>100,000 of them </span><span>American.</span> <span>The Pentagon </span><span>achieved a major success with the killing </span><span>of Al Qaeda leader Osama bin Laden in an operation in Pakistan on May 2, 2011</span><span>. </span> <span>Three years later, the Nato alliance ended its combat mission in Afghanistan</span><span>. </span><span>However, </span><span>12,500 soldiers – including 9,800 Americans – were kept in the country to train Afghan troops and </span><span>carry out anti-terrorist operations.</span> <span>Security in the country soon </span><span>degenerated as the Taliban's insurgency spread, with ISIS also </span><span>active in 2015.</span> <span>In August 2017, a new president, Donald Trump, scrapped timetables for a US pull-out and recommitted thousands more soldiers.</span> <span>However, <a href="https://www.thenationalnews.com/world/asia/afghan-families-left-to-grieve-alone-after-horror-attacks-1.1202790">deadly attacks multiplied, especially against Afghan forces</a>, and America dramatically increased </span><span>its number of air strikes</span><span>.</span> <span>In 2018, Washington and Taliban representatives discreetly opened talks in</span><span> Qatar, <a href="https://www.thenationalnews.com/world/the-americas/us-envoy-to-afghanistan-zalmay-khalilzad-meets-taliban-before-istanbul-conference-1.1195609">led by US special envoy Zalmay Khalilzad</a>, focused on reducing </span><span>the US military </span><span>presence in Afghanistan.</span> <span>In return, the US demanded that the Taliban prevent the country from being used as a safe haven for extremist groups, including Al Qaeda.</span> <span>On February 29 last year, </span><a href="https://www.thenationalnews.com/world/asia/us-taliban-truce-begins-paving-the-way-for-peace-in-afghanistan-1.982440"><span>the US and the Taliban signed a </span></a><span><a href="https://www.thenationalnews.com/world/asia/us-taliban-truce-begins-paving-the-way-for-peace-in-afghanistan-1.982440">deal</a></span><a href="https://www.thenationalnews.com/world/asia/us-taliban-truce-begins-paving-the-way-for-peace-in-afghanistan-1.982440"><span> </span><span>that paved the way for the withdrawal of all foreign forces from Afghanistan</span></a><span> by May this year</span><span>. This would be in return for the insurgents offering some security guarantees and agreeing to hold peace talks with the Afghan government.</span> <span>The peace talks began in Doha on September 12, but violence surged in Afghanistan as negotiations </span><span>stalled and the Taliban resisted government calls for a ceasefire. </span> <span>In the </span><span>following months, a </span><span>spate of high-profile assassinations, particularly in Kabul, </span><span>was </span><span>blamed on the Taliban, who </span><span>denied </span><span>involvement.</span> <span>By the end of Mr Trump's presidency in January this year, US troop numbers were </span><span>down to 2,500. In </span><span>February, Nato had about 10,000 service members in the country.</span> <span>The US withdrawal announced by President Joe </span><span>Biden extends the pullout </span><span>deadline by about five months, amid a growing consensus in Washington that little more can be achieved militarily in Afghanistan.</span>