Near the 13th century (around the time of the First Shadow War), the Ikarrans were invaded a half-dozen times by different alien races. They decided to create a kind of war machine that would repel the increasingly destructive invaders. Developed from leftover Shadow tech, these weapons were successful. However, programmed only to spare the nonexistent "pure Ikarran," they turned on the Ikarrans and wiped out their race. With no one left to tend to them, they wore out and died. The world became uninhabited afterwards.
In 2258, Earth Alliance corporation IPX sponsored a dig on Ikarra VII led by Dr. Vance Hendricks who had a theory that the world was once home to a space-faring civilization, which wasn't known at the time. During the dig, him and his team, including Nelson Drake, found a number of artifacts in a vault buried nearly a mile beneath the surface. The team spent several months on the surface digging them out. The artifacts turned out to be from the remaining war machine that wasn't activated a thousand years prior.
- While the warmachines wiped out the native sapient species, it's possible the flora and fauna native to Ikarra VII was spared. Hence, while the race is dead, the world itself still supports life.