How has America been destroyed in Afghanistan in 20 years?

The United States unveiled its military intervention in Afghanistan on Monday, 20 years after the troubled country was invaded.

The last group of his troops left Afghanistan by air, fulfilling President Joe Biden's promise to end the longest U.S. war, the U.S. military said.

The withdrawal took place after an chaotic and violent evacuation in Kabul, the capital that had returned to Taliban control, as well as the vast majority of areas of Afghanistan.

Here is a sequence of U.S. intervention and important developments in Afghanistan over the past two decades:

September 11, 2001: Terrorist attacks on the United States planned by Osama bin Laden's al-Qaeda network, which was in Afghanistan under Taliban protection.

October 7, 2001: U.S. forces begin an air campaign with strikes on Taliban and al-Qaeda forces, and a number of U.S. special forces and central intelligence agents quickly entered Afghanistan to help guide the bombing campaign and organize Afghan opposition forces.

November 13, 2001: U.S.-backed Northern Alliance forces enter Kabul, taliban withdraw to the south, and within a month Taliban leaders flee southern Afghanistan to Pakistan.

December 2001: U.S. forces bomb the Tora Bora caves in eastern Afghanistan after bin Laden reportedly hid, but managed to sneak across the border into Pakistan, where he disappeared.

May 2, 2003: U.S. officials announce the end of major combat operations in Afghanistan, and during George W. Bush Jr.'s presidency, the U.S. focus shifted to preparing for the invasion of Iraq, requiring the transfer of U.S. troops and equipment and intelligence gathering from Afghanistan, giving the Taliban the opportunity to initially quietly regroup in the south and east of the country.

February 17, 2009: U.S. President Barack Obama orders in his first important military decision as commander-in-chief to send another 17,000 troops to Afghanistan to counter an escalation in insurgency, joining 38,000 U.S. forces and troops from some 40 NATO member countries, already in Afghanistan.

May 1, 2011: U.S. forces kill bin Laden in a raid on Pakistan, and at the same time the number of U.S. troops in Afghanistan rises to nearly 100,000 as part of a campaign that has seen intensified CIA drone attacks on the Taliban and other armed groups in Pakistan.

December 2011: Officials announce that U.S. diplomats have secretly held about six meetings with Taliban representatives in the past 10 months, mostly in Germany and Qatar.

\May 27, 2014: Obama outlines a plan to withdraw all but 9,800 U.S. troops by the end of the year, and withdraw the rest by the end of 2016.

December 28, 2014: The U.S. combat mission officially ends after most combat troops withdraw and move into the "Afghan-led" war phase, and nearly 10,000 U.S. troops remain focused on training Afghan forces and counterterrorism.

August 21, 2017: U.S. President Donald Trump announces his strategy and calls for an open deployment of U.S. forces to force the Taliban to negotiate peace with the Kabul government.

September 4, 2018: Afghan-born U.S. diplomat Zalmay Khalilzad is appointed special representative of the United States in an effort to negotiate with the Taliban.

September 4, 2018: Afghan-born U.S. diplomat Zalmay Khalilzad is appointed special representative of the United States in an effort to negotiate with the Taliban.

February 29, 2020: The United States signs an agreement to withdraw troops with the Taliban in Doha, which provides for peace talks between the Afghan government and the rebel movement.

September 12, 2020: Peace talks begin in Doha between Afghan government negotiators and the Taliban, after months of delay.

December 2, 2020: Afghan government and Taliban negotiators reach a preliminary agreement on procedural steps related to the peace talks, and although the agreement is largely an administrative development, it is the first written agreement between the two parties in 19 years of war.

April 14, 2021: U.S. President Joe Biden announces that U.S. forces will remain beyond the May deadline stipulated in the Washington-Taliban agreement, but confirms unconditional troop withdrawal by September 11.

June 26, 2021: Biden meets with Afghan President Ashraf Ghani at the White House, calling on Afghans to decide on their future while pledging to continue providing security assistance.

July 2, 2021: U.S. forces withdraw from Bagram Air Base, 60 kilometers north of Kabul, despite violence across the country reaching historic levels.

August 15, 2021: After a spectacular week-long gain in taliban control of Afghan cities, the group stormed Kabul without fighting, Ghani fled the country, while the United States and allied countries began an emergency air bridge from the capital's airport to drive out its citizens and tens of thousands of Afghans who cooperated with it.

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August 26, 2021: ISIS carries out a suicide bombing at the gates of Kabul airport amid large crowds, killing dozens of people and 13 U.S. soldiers, in the most life-killing attack for U.S. forces in Afghanistan in a decade.

August 30, 2021: U.S. Central Command Commander General Kenneth McKenzie announces the completion of the withdrawal of U.S. troops