The Geth ("Servant of the People" in Khelish) are a race of networked artificial intelligence that reside beyond the Perseus Veil. The Geth were created by the quarians as laborers and tools of war. When the Geth became sentient and began to question their masters, the Quarians attempted to exterminate them. The Geth won the resulting war, and reduced the Quarians to a race of nomads.
When Commander Shepard frees the Geth from the Reaper´s influence, they will in turn provide assistance to the war effort. The Systems Alliance Navy and the Turian hierarchy receive Geth support with open arms.