"A failure to peacefully reintegrate as many as 60,000 heavily armed Taliban long-term would threaten any peace agreement as disaffected former Taliban who may have been expecting a peace dividend may return to violent and predatory behaviour", SIGAR spokesperson Lauren Mick said in a press release accompanying the report.
A weak economy, the report added, will offer few sustainable options for reintegrating Taliban fighters and without additional external donor funding, the peace agreement will collapse.
READ MORE: US May Drop Kabul From Talks With Taliban Over Official's Criticism — Report
The press release comes after negotiations between US and Taliban officials kicked off in late February in Doha where they agreed to a preliminary framework that calls for the United States to withdraw troops in exchange for counterterrorism assurances from the insurgents.
*Taliban is a terrorist group banned in Russia