The US army sergeant who abandoned his post in Afghanistan and was held captive by the Taliban could face up to life in prison if convicted of both the charges he is facing.
Sgt Bowe Bergdahl has been charged with misbehaviour before the enemy, which carries a maximum sentence of up to life in prison. He was also charged with desertion, which carries a maximum of five years.
Bergdahl could also face a dishonourable discharge, reduction in rank and forfeiture of all his pay if convicted of both the charges.
The case now goes to an Article 32 hearing, which is similar to a jury. From there, it could be referred to a court-martial and go to trial.
A date for that hearing was not announced.
The charges are the latest development in a long and bitter debate over Bergdahl's case. They also underscore the military and political ramifications of his decision on June 30 2009 to leave his post after expressing misgivings about the US military's role, as well as his own, in the Afghanistan war.
After leaving his post, Bergdahl was captured by the Taliban and held by members of the Haqqani network, an insurgent group tied to the Taliban that operates both in Pakistan and Afghanistan.
Last May 31, Bergdahl was handed over to US special forces in Afghanistan as part of an exchange for five Taliban commanders who were imprisoned at Guantanamo Bay, Cuba.
After spending about two weeks recuperating at a US military hospital in Germany, Bergdahl was sent to Brooke Army Medical Centre at Fort Sam Houston in Texas on June 13. He has been doing administrative duties at the base, awaiting the conclusion of the case.
The exchange set off a debate over whether the US should have released the five Taliban members. Little is known about what the five have been doing in Qatar, where they are being monitored by the government. Some politicians have predicted that the five would return to the battlefield.
Senator Lindsey Graham has said that he received information that one of the five has been in touch with members of the Haqqani network. On the flip side, Afghanistan's peace council in 2011 requested the release of one of the five, Khairullah Khairkhwa, from Guantanamo because it thought he might be able to help foster reconciliation talks with the Taliban.
Some within the military have suggested that Bergdahl's long capture was punishment enough but others, including members of his former unit, have called for serious punishment, saying that other service members risked their lives - and several died - searching for him.
A major consideration was whether military officials would be able to prove that Bergdahl had no intention of returning to his unit - a key element in the more serious desertion charges.