The Käthehirt Valley is a snow-covered valley held by a Rebel Armored Division composed of Iron Isos, Rebel Infantrymen, Di-Cokkas and Girida-Os, all of which are promptly dealt with by the commandos of the Regular Army. Allen O'Neil, a recurring minor antagonist in the series, is fought for the first time here.
- Judging by the snowy landscape and the large presence of Rebel tanks throughout the mission where it is set in, the Käthehirt Valley is likely based on the Ardennes region in Europe, where the Battle of the Ardennes took place during World War II.
Villeneuve Mt. System | Ronbertburg City | Käthehirt Valley | Ridge 256 | Gerhardt City | Straits of Traven | Saudi Arabia | Egypt | Rebel Supply Train | Hong Kong | New Godokin City | Rebel Siberian HQ | Rugname | Dr. Moureau's Island | Airplane Crash Site | Rebel's Secret Factory | Desert Ruins | Amadeus Mainframe Base | Corridor of Fire | New York | Osaka | Pekin | Meteor Crash Site | Scrap Island