ABC News documentary challenges Pentagon's claims of rogue Green Berets

ABC News probes the mystery behind the 2017 deaths of four Green Berets in Tongo Tongo, Niger, in the documentary "3212 UN-REDACTED," coming Nov. 11 to Hulu.

Four Americans gunned down in a withering, four-hour firefight in the Sahara -- part of a 10-man Green Beret team said to have gone rogue and been ambushed by ISIS while hunting down a top terrorist to "capture or kill" -- were ill-prepared, poorly trained and "not indicative" of their high-performing peers on the continent, U.S. military officials said. And in the strangest twist of all, they had been trying to locate an American aid worker who was being held hostage by the terrorist commander they were trying to kill.

That story, as presented by the Pentagon, sounded like an outlandish tale -- but it was all offered as fact by U.S. generals whose stiff uniforms sparkled with the glint of their stars and ribbons as they sat in the Pentagon's press room in the spring of 2018.

Yet almost none of the major allegations made public that day by United States Africa Command's (AFRICOM) top two generals against Operational Detachment-Alpha 3212 -- the team of special operations soldiers attacked by ISIS on Oct. 4, 2017, in Tongo Tongo, Niger -- turned out to be true, according to an extensive ABC News investigation.

The results of ABC News' three-year investigation into what happened at Tongo Tongo are revealed in the new documentary feature, "3212 UN-REDACTED," coming to Hulu on Veterans Day, Nov. 11.