So Liberty suddenly realised, that they could use a Naval force, but instead of building it in the home system, they decided to locate a separate system for building and such activities? Or did some Navy officers suddenly <strike>appear</strike> sprout in Virginia <strike>like humans in Australia</strike>?
What is Norfolk Shipyard for, then? Built in 87 AS...
Same with Xenos. They didn't just think 'Hey! We should start a ultrapatriotic movement in this uncharted system and spread it out!'