Right now there are total six countries claim to own the Spartly islands. And two countries claim to own the Paracel islands. Both disputed areas are in South China Sea. With part of Paracel islands lay within both China and Vietnam's EEZ. The hottest spot is at Spartly islands. With Vietnam controls more than 30 islands/reefs. Taiwan controls only one but the largest land mass. Philippines also controls more than a dozen islands/reefs. China controls 7 islands/reefs. It seems the US government backs everyone who is not China when it comes to dispute with China. So the question is, whether or not the US is willing to go to war with China if China calls it bluff? And if the other countries would be bold enough to go to war with China because they believe the US will back them up in a conflict?