Lucius Kobel commands the Earth Defence Force during their reign over Mars. He does not reside on the planet himself, preferring to remain in a massive spacecraft, named the EDS Hydra. The Hydra ship is much like its Greek mythological namesake, being incredibly powerful with a massive presence included. Kobel is far from stupid, and has ensured that he is in a position to seize control of the EDF from Bertram Roth at a moment's notice, should the opportunity arise.
Kobel is the final member of the EDF killed during Red Faction: Guerrilla, and he is killed using the Marauders technology and the base design of the Nano Rifle. The Hydra is hit with a missile of sorts, packed with the nanites that make the Nano Rifle such a valuable piece of technology. These nanites rip into the Hydra at high speed, and likely kill Kobel alongside his craft.