I love the Christiana story.

Hippies take over military base just works; from a thematic and story telling sense, at least.

"In 1971, several hundred squatters took over an abandoned military barracks in Christiania and attempted to create their own utopia. Two generations later, 800 idealists still live here, defending their right to enjoy life on their terms, while real estate developers set their sights on this now desirable piece of land."