USA

Change the paint from USA to China and you have the exact same story. China has been invading neighbouring country's water for quite some time now, uninvited. US tend to do so with permission of that specific country.

But of course i can't discount OP having the opinion that ALL of South China Sea belong to China.

I’m late to the party but, damn, that struck a nerve with imperial core labor aristocrats 😂

Dumb. UN Convention on Law of the Sea. I appreciate the free flow of goods and safe travel of people on the high seas.

What the PRC is doing is taking a shit on the internationally recognized ability to sail freely on the high seas (and in Vietnam and PI’s case - in their own territorial waters). So everyone who is complaining about Israel taking a shit on the UN better look at what China is doing in the SCS. Same, same.

I’ll just leave this here.

UNCLOS

Ignore the down votes. This is dead nuts accurate.

And this is just one of myriad such examples.