ORIGINAL: SeaQueen
Officially, the US is neutral in this dispute, supporting no single nation's claim to the islands. The US government supports the UNCLOS. I think it would be a mistake to assume that a US intervention in a Chinese land-grab would necessarily mean supporting one nation's claim over the other. It could also represent the position that a warlike resolution of the dispute is unacceptable. The end-game might be some sort of mediated resolution between the interested parties or a restoration of the status quo (they're "nobody's islands" in practice).
It's like, during the first Gulf War, the US remained neutral on the border dispute between Iraq and Kuwait. It merely took the position that conquering Kuwait and deposing the royal family was unacceptable. The goal was to restore the Kuwaiti royal family, push the Iraqi army out of Kuwait, and restore the borders to their pre-war state.
I suspect a Spratly conflict would most likely have similar limited goals, where US/Coalition victory doesn't mean that the Philippines, ROC, or Vietnam gets the islands. It just means a restoration of the status quo, which while not ideal to the conflict's participants, probably is more preferable to all parties than any single party controlling them.
Take a look at the book The Asia-Pacific Century: Challenges and Opportunities by Adam B Lowther, p 122.
What is status quo? Like Philippine troops to open fire on Chinese fishermen and kill one of them? That happened in year 2000. And they killed several fishermen from Taiwan region quite recently. Machine gunned an entire boat like those fishermen were gunning targets. Or Vietnam force shoot at Philippine Air Force recon plane? That happened in 1999. The status quo in SSC is not observation of UNCLOS but open fire when one fell appropriate.
Actually, I did not see USN sent any warship when Taiwan fishermen were killed by Philippine troops. Nor did they sent US warplanes to site of Vietnam land reclamation, so they don't shoot Philippine aircraft again. They even cheered at Chinese action at Chi Gua reef at 1988. The USG is the one that trying to change the status quo there- from everyone open fire when they fell appropriate to everyone beside China can open fire as they like and Chinese must refrain.






