On a map, they are almost insultingly small. A chain of islands so minute that the eye skips past them, drawn instead to the vast blue nothing surrounding them. But the ocean is not just an empty space. It is a highway. And an island is the only place you can build a tollbooth. And yet these fragments of territory, which are remote, often uninhabited, and ecologically fragile, are among the most contested pieces of land on earth. Empires were built to control them. Treaties h
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