WASHINGTON — Naqibullah was about 14 years old when U.S. troops detained him in December of 2002 at a suspected militant's compound in eastern Afghanistan.

The weapon he held in his hands hadn't been fired, the troops concluded, and he appeared to have been left behind with a group of cooks and errand boys when a local warlord, tipped to the raid, had fled.

A secret U.S. intelligence assessment written in 2003 concluded that Naqibullah had been kidnapped and forcibly conscripted by a warring tribe affiliated with the Taliban. The boy told interrogators that during his abduction he'd been held at gunpoint by 11 men and raped.

Nonetheless, Naqibullah was held at Guantanamo for a full year.

Afghans were the largest group by nationality held at the Guantánamo Bay detention center, an estimated 221 men and boys in all. Yet they were frequently found to have had nothing to do with international terrorism, according to more than 750 secret intelligence assessments that were written at Guantánamo between 2002 and 2009. The assessments were obtained by WikiLeaks and passed to McClatchy.

In at least 44 cases, U.S. military intelligence officials concluded that detainees had no connection to militant activity at all, a McClatchy examination of the assessments, which cover both former and current detainees, found. The number might be even higher, but couldn't be determined from the information in some assessments, which often were just one or two pages long for Afghans who were released in 2002 and 2003.

Still, it's clear from the U.S. military's own assessments that beyond a core of senior Taliban and extremist commanders, the Afghans were in large part a jumble of conscripts, insurgents, criminals and, at times, innocent bystanders. Just 45 were classified as presenting a high threat level, and only 28 were judged to be of high intelligence value. At least 203 have now been released.

U.S. Department of Defense officials have declined to comment on the contents of the WikiLeaks documents, saying they are stolen property and remain classified.

The records contain no single explanation for why so many Afghans with few links to terrorism came to be held at the prison camps in Cuba, a facility that the George W. Bush administration said was intended to house only the most serious of terrorist suspects.

Anecdotes from the documents suggest that many of the Afghan captives were picked up by mistake. Others were passed along to U.S. troops by Afghan warlords and local militias who gave false information about them in return for bounty payments or to set up a local rival.

There was also a desire by U.S. intelligence analysts, particularly in the scramble after the Sept. 11, 2001, terrorist attacks, to cast as wide a net as possible. They were looking to piece together everything from which dirt paths were used to cross between Afghanistan to Pakistan, to the relationship between the Taliban and al Qaeda.

Afghans became crucial for understanding the lay of the land — and for many it cost them years of their lives in confinement.

For at least three Afghan men, the reason listed for being at Guantánamo was a variation of "knowledge of routes between Afghanistan and Pakistan."

The assessments for at least four others listed as the reason for holding them at Guantánamo their knowledge of the Taliban conscription process — meaning they'd been forced to join the organization.