Snowcap

Snowcap was a space tracking station in Antarctica. It was originally commanded by General Cutler and operated under International Space Command. Besides its primary function of mission control, it contained an arsenal of cobra missiles and launch facilities for Demeter rockets, each capable of carrying a Z-Bomb. It was supported partially by a relay station in Hawaii. In December 1986, the base was attacked by the Cybermen. Although the Cybermen were ultimately thwarted by the First Doctor, the ordeal resulted in his regeneration into his second incarnation. (DW: The Tenth Planet)

In 2006, Snowcap was the headquarters of the FLIPback project, the human race's defense against the sudden reversal of the Earth's magnetic polarity. In December of that year, while under command of General Pamela Cutler (daughter of the previous commander and general), the base was again attacked by Cybermen, this time survivors of the failed Faction invasion (DW: The Invasion) using salvaged Mondan technology from the 1986 events, thwarted this time by the Seventh Doctor. (NA: Iceberg)