Six Asian countries have competing claims on the South China Sea, but only China has backed its claims with artificial island-building, military bases and naval patrols. The USA has not taken sides in the territorial dispute, but sends military ships and planes near disputed islands, for ‘freedom of navigation’ operations to help key shipping and air routes. Both countries have accused each other of ‘militarising’ the area, and have long been at odds over maritime freedom. US secretary of state Mike Pompeo has now called China's pursuit of offshore resources ‘completely unlawful’, condemning Beijing's ‘campaign of bullying to control’ disputed waters that are potentially energy-rich with reserves of natural resources around them in a shipping route and major fishing ground. There are fears that the area is becoming a flashpoint, with potentially serious global consequences of a military response. See https://www.foxnews.com/world/china-accuses-us-confrontation-south-china-sea