'It is time to end America's longest war': Biden addresses Afghanistan withdrawal today

The war in Afghanistan has cost more than $2 trillion and more than 2,300 American lives.

"I am now the fourth American president to preside over an American troop presence in Afghanistan – two Republicans, two Democrats," Biden will say, according to excerpts of his speech provided by the White House.

Since the invasion, more than 775,000 American troops have served at least one tour of duty in Afghanistan, with 98,000 troops in the country at the height of the war in 2011 before a steady decline over the last decade.

The war in Afghanistan – which sought to establish democratic governance, defeat al-Qaeda and push the Taliban out of power – has cost more than $2 trillion and more than 2,300 American lives.

Biden's exit timeline will extend military presence in Afghanistan beyond the May 1 withdrawal date previously negotiated by former President Donald Trump.

"We cannot continue the cycle of extending or expanding our military presence in Afghanistan hoping to create the ideal conditions for our withdrawal, expecting a different result," Biden will say. "It is time for American troops to come home.".

troops from Afghanistan by Sept.

troops who remain in Afghanistan will begin before May 1 in coordination with NATO allies and the withdrawal of their troops which number around 7,000. The Biden administration warned the Taliban that any attacks on the U.S

That includes training and equipping more than 300,000 members of the Afghan National Defense and Security Forces, he will say, and supporting peace talks backed by the United Nations between the Afghanistan government and the Taliban. 

Al-Qaeda used Afghanistan, under control of the Taliban, as a safe haven from which to plan the Sept

More: Biden faces Trump's deadline on Afghanistan troop withdrawal: 'Any way you cut it, we are headed for a messy outcome'

withdrawal would thrust Afghanistan further into chaos and violence

troops on the ground any longer could spark a backlash among progressives who want to see an end to the war in Afghanistan