Longest War

I'm now the fourth United States President to preside over American troop presence in Afghanistan: two Republicans, two Democrats.  I will not pass this responsibility on to a fifth.

After consulting closely with our allies and partners, with our military leaders and intelligence personnel, with our diplomats and our development experts, with the Congress and the Vice President, as well as with Mr. Ghani and many others around the world, I have concluded that it's time to end America's longest war. ...

We went to Afghanistan because of a horrific attack that happened 20 years ago.  That cannot explain why we should remain there in 2021. 

War in Afghanistan was never meant to be a multi-generational undertaking. ...  And it’s time to end the forever war. 

-- Remarks by President Biden on the Way Forward in Afghanistan, 14 April, 2021