Ethnic background of people - sc2 Star district human be Koprulu relatively new immigrants.Few centuries ago a group of opponents of the government as the Earth has been put into the general sc2 cargo ship launched into space immigrants had a very long expedition failed.It is these people are human descendants.The expedition's survivors were eventually established three colonial planet is also the main human rights group of space: the federal government, Kel-Morian Union, Umojan protectorate.Corrupt and incompetent federal government in the Zerg invasion of the disturbances caused by a terrorist or a revolutionary vanguard of the sc2 Trask called the reverse.And now, the human Empire from the ashes of the old Federation was born, the only ruler from the Arcturus I, the rule.\ R \ n \ r \ n humans have been forced to adapt to this most of the sc2 are extremely desolate area, they become the king of survival.Since neither do the highly developed science and technology support, nor to rely on strong physical, human army is a mixture of various units in sc2 .Such as the Marine Corps from basic but effective man-though to a focus on armored battle cruiser, the human armored units with a reliable, powerful and numerous amount of firepower to maintain the front.Human army with bunkers and siege tanks in support of defense operations is to shine. You can search " sc 2 ",understand more it . http://www.sc2profile.com/

Zerg is a completely different human beings and the Protoss race.Their population is infected by them through the composition of the other race.Zerg --sc2 rule in order to achieve the purpose of all these creatures, once infected, there is the rapid evolution of choice for the effective and lethal killing machine.Zerg do not need to use technology to make weapons, armor or spacecraft.Instead, these functions through biological adaptation and planned mutation and effective implementation.Even zerg buildings are also some near the nest continuously attached to the specialized function of the growth of the organs of the organism.When the zerg first arrived in Koprulu Star area, they from a collective consciousness of the Zerg - sc2 dominate the absolute rule.Dominate the low-level awareness of the body through a number of fundamental command of the Swarm in the actions of each Zerg - sc2 .The first and most important link is the brain worm, each worm has been commissioned a brain insect groups directly control the size of a considerable part.The implementation of the host computer worm is a command, responsible for the field in the nest and most of the direct command and control of different insects.Although the primary purpose is to dominate the highly evolved to destroy the Protoss and absorb their genes race, but it is also found in humans but not yet developed the very useful things.Infection of a human with a strong psionic, Sarah Kerrigan, the dominant evolved a new and unique creature: the Queen of Blades.Al the time of the invasion when the master is destroyed the Protoss, Dark Templar Queen of Blades manipulated the rest of the living brain elimination of insects, and eventually dominated the insect group -sc2 . Please read more " sc 2 " http://www.sc2profile.com/