WASHINGTON • As weary U.S. military planners wrapped up the evacuation and pullout from Afghanistan one year ago, officials across the government steeled themselves for intense public scrutiny into how America’s longest war ended in shambles with the Taliban retaking power.

But as the United States marks the first anniversary of the withdrawal this month, some U.S. officials and experts say President Joe Biden’s administration has moved on without properly assessing lessons from the 20-year war and the Taliban victory.

Nor has there been public accountability for the chaotic evacuation operation that saw 13 U.S. service members killed at Kabul’s airport and hundreds of U.S. citizens and tens of thousands of Afghans left behind, they said.

“We need to open up that ugly history book called the 20 years in Afghanistan and see why we fail,” said John Sopko, the U.S. special inspector general tapped with tracking some $146 billion in reconstruction aid.

These lessons are especially crucial now as the administration pumps billions of dollars of assistance into Ukraine’s fight against Russia,

Sopko told Reuters.

U.S. policymakers, however, are now preoccupied with Russia’s onslaught against Ukraine and soaring tensions with China, even as the Taliban erase women’s rights, harbor al-qaida militants and execute and torture former government officials.

The Biden administration portrays the pullout and extraction operation — one of the largest airlifts ever — as an “extraordinary success” that wound up an “endless” conflict that killed more than 3,500 U.S. and allied foreign troops, and hundreds of thousands of Afghans.

The evacuation ferried more than 124,000 Americans and Afghans to safety over 15 days.

Tens of thousands of Afghans, many of whom worked for U.S. forces, now have resettled in the United States in the largest U.S. refugee operation since the Vietnam war.

To be sure, Biden was left a mess by his predecessor Donald Trump, who committed to completing the troop pullout by May 2021 without processing a massive backlog of visa applications from Afghans who worked for the U.S. government.

“We inherited a deadline in Afghanistan, but not a plan for withdrawal,” a National Security Council spokesman said.