Briggs

The northern base of Amestris located in a mountain range, commanded by Major General Olivia Mila Armstrong. It is a huge underground complex housing thousands of soldiers who regularly go out on patrols, as well as the centre for the development of non-alchemic weapons. Most if not all the soldiers there are extremely paranoid, accusing anyone whom they do not know of being spies from the nation of Drachma to the north. Apparently, only one incident involving patrolling soldiers successfully being attacked occurred over a period of a month about twenty years before the arrival of Major General Armstrong; the attacker was identified to be a woman, though not a spy from Drachma. Gaiden chapter "Tales of the Master" reveals that the woman was actually a young Izumi Curtis.