Jack Teixeira faces a lengthy situation condemnation if convicted of engagement successful what the Pentagon has deemed a "very serious" nationalist information risk, experts person said.
The 21-year-old subject cyber-specialist is suspected of leaking delicate US documents.
The Pentagon said it believes the leak was a deliberate transgression act.
Mr Teixeira is expected to marque his archetypal quality successful tribunal connected Friday successful Boston.
He is simply a subordinate of the quality helping of the Massachusetts Air National Guard.
What charges is helium facing?
Merrick Garland, the US lawyer general, said Mr Teixeira faced charges nether the 1917 Espionage Act.
Steven Stransky, an lawyer who antecedently served arsenic elder counsel to the Department of Homeland Security's Intelligence Law Division, said the enactment was "very aged and outdated" and "essentially criminalises an idiosyncratic collection, disclosure oregon perchance re-disclosure, of nationalist defence information".
He added that portion the word "national defence information" is lone vaguely defined successful the law, it broadly means accusation that "can injure the United States oregon enactment america astatine a disadvantage vis-a-vis different 3rd country".
Several spies and radical who person shared classified accusation with the property and the nationalist person been charged since the instrumentality was archetypal enacted successful 1917, albeit infrequently.
It has historically mostly been applied to Americans recovered spying for overseas countries, specified arsenic Julius and Ethel Rosenberg, who were executed successful 1953 aft being recovered blameworthy of passing atomic secrets to the Soviet Union. The Espionage Act authorised the decease punishment for espionage "in clip of war" - and astatine the time, the US was progressive successful the Korean war.
More recently, the Espionage Act has been applied to whistleblowers and radical who person leaked delicate information, including Wikileaks root Chelsea Manning and ex-CIA contractor Edward Snowden.
What could hap if helium is recovered guilty?
This volition beryllium connected the charges Mr Teixeira volition face.
When the Espionage Act was primitively passed, it stipulated situation sentences of 20 years oregon little and fines of up to $10,000 per charge.
Reuters quality bureau quoted Brandon Van Grack, a erstwhile Justice Department nationalist information authoritative present with the instrumentality steadfast Morrison Foerster, arsenic saying the apt charges could transportation up to 10 years' imprisonment, adjacent if Mr Teixeira did not mean to origin harm.
"This is idiosyncratic who is facing connected the higher extremity of vulnerability for years successful prison... due to the fact that the leaks were truthful damaging," Mr Van Grack said.
"There's surely transgression charges that could connect to it [the Espionage Act] and there's fiscal penalties arsenic well," Mr Stransky said. "If the justness section is pursuing a transgression usurpation for the Espionage Act, they're astir often looking for jailhouse sentencing arsenic a mode to deter these types of aboriginal actions."
The Pentagon property caput indicated it would dainty the leak highly seriously, saying it was "a deliberate transgression act". A Pentagon spokesperson said that "stringent" guidelines were successful spot for employees and that "anyone who violates those rules is doing truthful wilfully".