Humbarine was an ancient ecumenopolis and a Core Founder. It was the capital world of a rich and heavily industrialized sector.[3] The planet was also loyal to the Republic during the Clone Wars, thus making it a target for the Separatists.
Some time following the conquest of Duro, a CIS fleet under GeneralGrievous's flagship Invisible Hand launched several assaults on Humbarine.[2] This included an hour-long orbital bombardment that melted the crust of the planet, thus destroying the planetwide metropolis and presumably killing much of the population.[1][2]
Survivors from the sector defense forces, like Barrow Oicunn, were relocated to other Republic units for the remainder of the war.[2] With additional planets in the sector falling to the CIS,[4] the entire Humbarine sector was eventually considered lost to the Separatists and abandoned by the Republic.[2]