WASHINGTON • A government watchdog says decisions by Presidents Donald Trump and Joe Biden to pull all U.S. troops out of Afghanistan were the key factors in the collapse of that nation’s military.

The new report by the Special Inspector General for Afghanistan Reconstruction, or SIGAR, mirrors assertions made by senior Pentagon and military leaders in the aftermath of the U.S. troop withdrawal that ended last August in the chaotic evacuation of Americans and other civilians from the embattled country.

Military leaders have made it clear that their recommendation was to leave about 2,500 U.S. troops in the country, but that plan was not approved.

In February 2020, the Trump administration signed an agreement with the Taliban in Doha, Qatar, in which the U.S. promised to fully withdraw its troops by May 2021. The Taliban committed to several conditions, including stopping attacks on American and coalition forces. The stated objective was to promote a peace negotiation between the Taliban and the Afghan government, but that diplomatic effort never gained traction before Biden took office in January 2022.

Just a few months later, Biden announced he would complete the U.S. military withdrawal. The announcement fueled the Taliban’s campaign to retake the country, aided by the Afghans’ widespread distrust of their government and entrenched corruption that led to low pay, lack of food and poor living conditions among the Afghan troops.

“Many Afghans thought the U.S.-Taliban agreement was an act of bad faith and a signal that the U.S. was handing over Afghanistan to the enemy as it rushed to exit the country,” the interim report said. “Its immediate effect was a dramatic loss in (Afghan troops’) morale.”

U.S. officials have said they were surprised by the quick collapse of the military and the government, prompting sharp congressional criticism of the intelligence community for failing to foresee it.