During the Yuuzhan Vong's extra-galactic invasion of the galaxy, which occurred from 25 to 29 ABY, the species launched an assault on the Ord Janon system. This event, situated between 25 ABY and 26 ABY, followed the Battle of Birgis, where the Yuuzhan Vong, supported by mercenary Mandalorian Protectors, seized the planet Birgis from the New Republic. Post-Birgis, the Yuuzhan Vong divided their forces to target two locations, with one contingent heading towards the Ord Janon system.
The initial depiction of the assault on the Ord Janon system appeared in The Essential Atlas, a 2009 sourcebook authored by Daniel Wallace and Jason Fry. Within the Atlas, the attack was featured on a map entitled "Vector Prime and the Yuuzhan Vong advance," illustrating the movements and battles of various factions engaged in the Yuuzhan Vong War, spanning from 25 ABY to 26 ABY. While the book omits details regarding the attack's resolution, a distinct map indicates that the Ord Janon system had fallen under Yuuzhan Vong dominion by 26 ABY.