The Military Facility/Corridor, known as Base - Walkway (基地・連絡通路,Kichi renraku tsūro?) in the Japanese version, is the corridor which leads to the Medical Room, the Control Room and back to the front lobby.
When Dylan enter this area for the first time, no enemy are present. Though, after exiting the Medical Room with the Key Plate, Velociraptor will be present here. When Regina ventured the Military facility, she will also encounter Velociraptor. There's a Med Pak M located not far from the Control Room entrance at the shelf.