Marvel Universe

After the Fall of the Mutants, several former X-Men joined forces with UK-based heroes to form a team in defense of the British Isles. Eventually gaining the unofficial title of "the European X-Men", Excalibur operated out of a abandoned lighthouse and later Braddock Manor for the first 70 issues of their series. For issues #71-125, they became a search and rescue unit operating out of the Muir Island Research Facility. The team eventually disbanded when most of its members either married off or returned to the X-Men.