Complex sentence: When Fu Manchu was finally defeated, Black Jack became part of a group that elected to remain together as private adventurers under the name Freelance Restorations, which was based out of Stormhaven Castle in Scotland with leased offices in London.
Split into simpler sentences: When Fu Manchu was finally defeated, Black Jack becomes part of a group that elects to remain together as private adventurers under the name Freelance Restorations. This orginization is based out out of Stormhaven Castle in Scotland with leased offices in London.