WASHINGTON — President Biden offered a defiant defense on Monday of his decision to withdraw troops from Afghanistan, blaming the swift collapse of the Afghan government and chaotic scenes at the Kabul airport on the refusal of the country’s military to stand and fight in the face of the Taliban advance.

Speaking to the American people from the East Room after returning briefly to the White House from Camp David, Mr. Biden said he had no regrets about his decision to end the longest war in United States history. But he lamented that two decades of support failed to turn the Afghan military into a force capable of securing its own country.

“We gave them every tool they could need. We paid their salaries. Provided for the maintenance of their airplanes,” Mr. Biden said. “We gave them every chance to determine their own future. What we could not provide was the will to fight for that future.”

Read the Full Transcript of President Biden’s Remarks on Afghanistan