“US forces are out and the war for the United States is over, but this is not the final chapter,” he said in a series of tweets.
Khalilzad also said he remained committed to peace in Afghanistan and the region.
“I am committed to the possibility of peace and prosperity in Afghanistan and in the wider region. This is what Afghans have yearned for more than 40 years. The United States stands with them,” Khalilzad added.
The Afghan-American diplomat said in the tweets that the United States, the international community and Afghan leaders would stay in touch and he welcomed Thomas West’s appointment as his successor.
He also thanked the US State Department, Defense and intelligence officials “who joined me on this mission “.
Khalilzad’s resignation came two months after the Islamic Emirate of Afghanistan (IEA) took control of Kabul.