[[Image:|260px]] Cluster View SystemsN/A RelaysN/A Location: Milky Way / Krogan DMZ Prerequisite: Mordin: Old Blood or Grunt: Rite of Passage (Mass Effect 2) Prerequisite: Priority: Sur'Kesh (Mass Effect 3) The Krogan DMZ (Demilitarized Zone) is a star cluster relatively near to the Local Cluster and Serpent Nebula, towards the galactic center. As the name would imply, it is home to the birthplace of the krogan race, Tuchanka and nearby star systems occupied by the krogan prior to and during the Rachni Wars and Krogan Rebellions.