The Free Fire Zone is a large restricted area to the northern end of the Parker sector which acts as a buffer zone between the capital sector of Eos, the crown jewel of the Earth Defence Force, and the rest of Tharsis. It is also used back by the Red Faction against the EDF to protect the Marauder Convoy attempting to cross over Eos sector and eliminating the EDF remaining forces trying to reach the accelerator cannon in the Battle of Mount Vogel. The range of these huge guns is undeniably formidable.