It is a very simple and common route in mission 3. Go straight or take the Slug Mariner routes before destroying the first missile wall.
This is a hidden vehicle factory kept by the Rebels that the Regular Army only recently discovered. It is well guarded by Supervisory Cameras and Patrol Robots. Rebels are numerous, and there are an abundance of boxes placed throughout, blocking the paths. In the background, several vehicles are shown being made. After crossing the 2nd floor, there is a room containing LV Armors, only one of which can be used after destroying the other. The boss of this level is a mechanized robot, Jupiter King.
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