For 20 years of US military intervention in Afghanistan, four presidents want to withdraw from this quagmire, but no one can do until Biden.

America has lost more than a trillion USD and the lives of thousands of soldiers for the longest war of this country in Afghanistan.

Experts believe that many US presidents have wished to withdraw from the war that was not supported by the people, but they were trapped in the risk of the safety of the United States threatened if they ordered the withdrawal.

They realized that almost all of the choices that the United States had to leave in the end creates an unstable Afghanistan, where no one can predict what will happen next, Anthony Cordesman, medium policy expert

After the tragedy on September 11, 2001, President George W. Bush announced to launch the war in Afghanistan and Iraq to search for those who caused horrific terrorism aimed at the United States.

He received support from the National Assembly and a large public with these wars, but eventually created a new conflict in strange land and realized many mistakes, according to Emily Harding, Love experts

The Bush government once hoped after eliminating the bad guys in Afghanistan, they could hand over the power safely for the people of the country.

Bush then focused on the Afghan reconstruction plan as the next necessary step in his terrorist war.

Bush's optimism in Afghanistan is accretionated by the belief that democracy will thrive when there is a chance.

When former President Bush left in 2009, about 25,000 US soldiers in Afghanistan.

An American soldier at the military base in Logar Province, Afghanistan in August 2018.

Barack Obama campaigned to election with the position of opposing the war in Iraq and skepticism of the global terrorist war.

His strategy is to strengthen the force here as much as possible to find a way out of Afghanistan.

The former President used to call to stop fighting in 2014 and then announced the war ended.

A remarkable milestone in the fight against persecution under Obama was the US to destroy Osama bin Laden, the master of the 2001 terrorist attack, after a decade of running away.

However, Washington's Craig Whitlock editor said Obama's ending war claims to lie, because in fact the war in Afghanistan didn't really end.

Until Donald Trump took over the role of the US President in 2017, he and the United States were no longer interested in the war in Afghanistan.

Could they be there for 200 years more than 200 years? "Trump said when I was running in 2015.

With the opinion of the United States above all and longing for the end of expensive wars, Trump in 2020 signed a DOHA peace agreement with the Taliban, clearly stating that the United States will leave Afghanistan within a year and return to the Taliban commitment not to leave

I really believe Taliban wants to do something to show us don't waste time, Trump said.

However, Paul Miller, a veteran who used to fight in Afghanistan and showed teaching at Georgetown University, said Trump could not give a specific mechanism to prevent the Taliban to accept terrorists.

Trump reduced the number of US troops in Afghanistan to 2,500 people, but did not officially end the war in this Central Asian country.

When Joe Biden entered the White House, the debate about with withdrawing America from Afghanistan was initiated and he became the first president to actually do it.

Biden reversed many decisions of Trump, but still holds the Doha peace agreement with the Taliban.

America has done what we have to do in Afghanistan, which is to find the 11/11 terrorist, enforce justice with Osama bin Laden, weaken the terrorist threat to prevent Afghanistan from becoming a basis for the

However, the decision to withdraw Biden troops stumbled around criticism that was increasingly harsh, when the Afghan administration quickly collapsed after the Taliban's flash attack.

American intelligence ever warned that the Taliban could take Afghanistan within 6 months.

But the Taliban actually controled Afghanistan even before the US officially left.

Although daring to do something that no US President did, Biden was given a lack of reality on possible consequences when ending the war, according to analysts.