Why the South China Sea is becoming geopolitically and geostrategically important. It's control over the oil routes. The US needs continuing control over the South China Sea in order to be able to deprive China of energy, and China needs to prevent that. Collision course in the making. In addition, fundamental to US global hegemony aka the American Empire is control of sea, air, and space.
Zero Hedge
China Could Hold Oil Market To Ransom, Tops US As World's Largest Importer