Fort Constantine Fort Constantine is a large outpost and ICBM launch facility in the northwest Capital Wasteland , between the SatCom Array NW - 05a and SatCom Array NN - 03d . It is heavily guarded by a wide variety of robots , including sentry bots , Mister Gutsies , robobrains and protectrons , inside and out . Background . Fort Constantine is a military base built by the US Army in 2043 . It was used to build and store nuclear bombs , and also the top secret power armor that was under development at the time . In 2257 , Allistair Tenpenny hired 5 mercenaries — Mister Crowley , Dave , Dukov , Jeff Strayer and Tara Fields — to retrieve a rare weapon from the fort . It is unknown what weapon Tenpenny was after , but the mercs completed the mission goals and were paid . In the bunker , Tara was killed by a group of feral ghouls and Crowley was locked in the same room ( from this we learn feral ghouls do not attack human ghouls which is how Crowley escaped ) . Crowley supposedly found the T - 51b power armor in Fort Constantine , at which point he became obsessed with it . The rest of the group , knowing Tara was dead and thinking Crowley was dead as well , went their separate ways . Years later , Mister Crowley , now living in Underworld , wants the player character to find all the other surviving mercs ( except for Jeff Strayer , whose son , Ted Strayer , holds the key required by Crowley ) and shoot them in the head , then return the keys . Layout . The area contains three buildings : The doors to the bomb storage ( warhead storage ) are both locked with a Very Hard lock , but the bomb storage basement can be alternatively accessed through an underground path in the cellar of the CO quarters . ( The floor plan picture for the launch control bunker has been mislabeled . The north door connects to the CO ' s quarters , the southern one leads to the bomb storage section . ) The Fort Constantine bunker door can be opened only with Ted Strayer ' s special key and cannot be lockpick ed . Also , the only access to the T - 51b power armor is through this pathway , as the door can ' t be opened from the other side in the bomb storage , because Tara holds the key . However , the cellar grants access to the launch control bunker , eventually leading to the basement of the bomb storage . The door to the bomb storage requires Dukov ' s special key . In here is Tara ' s corpse , ( which holds the warhead storage key ) , two Very Hard locked doors and a door ( can be accessed only with Dave ' s special key ) on the opposite side which finally leads to a room with the T - 51b power armor . The CO quarters contains the Fort Constantine launch codes stored in a small safe in the cellar next to the Big Guns bobblehead . These can be used to launch the ICBM from the Fort Constantine launch control terminal in the launch control bunker . After attempting to launch the ICBM , the launch terminal reports an error and mentions that the missile ' s tracking system is damaged and the navigation data is corrupted . The alarms will sound and the doors will shut , but only for a few seconds and open again afterwards , or they can be opened manually ( they don ' t lock ) . Appearances . Fort Constantine appears only in " Fallout 3 " . Behind the scenes . The launch codes found in Fort Constantine are " 00000000 , " a reference to the United States nuclear launch codes which were created in 1961 during the Cold War and weren ' t changed to legitimate codes until the year 1977 .