Located in Siberia, where the primary Marked of Kane research facility was located, these mysterious structures stood silently among the snow, their purpose unknown to anyone but Kane and the Inner Circle. GDI opted to estabilish a military base in the location where they were located, in order to monitor them in case anything would happen.
For a long time, nothing happened, however, in 2052, after nearly three decades of silence, LEGION invaded the region where the control nodes were located and activated them, bringing the Marked of Kane online. Local GDI forces attempted to retaliate, but were crushed by fierce Nod opposition.
And then, the Marked of Kane awoken from their slumber and emerged from the underground caverns.