An alleged international computer hacking ring stole the US military's Apache training programme - and the highly-prized source codes for Xbox games.
Two of the four men accused - a 28-year-old New Jersey man called Sanadodeh Nesheiwat and David Pokora, a 22-year-old man from Canada - have pleaded guilty to hacking charges.
They are said to have logged into a US Army network to steal simulator software for the Boeing Apache attack helicopter.
They had previously hacked into the network of Zombie Studios, a video game developer in Seattle contracted by the Army to make the training software, and stole usernames and passwords.
Prosecutors also say the men gained unauthorised access to Microsoft's computer network, including some of its partners, between 2011 and 2014 to steal source code and other information.
According to the indictment, some of the attacks were aimed at creating a counterfeit version of the Xbox One console before its November 2013 release.
Prosecutors say pre-release versions of Gears of War 3 and Call of Duty: Modern Warfare 3 were also compromised.
Nathan Leroux, 20, of Bowie, Maryland, and Austin Alcala, 18, of McCordsville, Indiana, were also charged in the 18-count indictment. They deny the charges.