That's Korean. Mainly.
It should be noted the number of actual deaths of ROK Army in the war is 137,899 according to
South Korean Ministry of National Defense
No USC member has more than 700 combat death except Turkey: 721
IN brief, I disagree on below:
you brought the unproven data ( for example: over 600,000 death ) and
call that casualties of 16 UN countries. While
mainly casualties is S Korean. ( 137,899 death as SK Ministry of National Defense ). There're no more than 65,000 death of UN including US soldiers, excluding SKorean soldiers.
And
you also brought the data in rumor: 360,000 Chinese troops deaths.
( According to Western source : 600,000 )
And without any number on N Korean death soldiers.
( western source : 406,000 )
So what's your purpose?
---------
What I could summarize that China has the largest quantity soldiers death, wound, or missing among foreign military forces engaged in Korean War.
The second high casualty is USA.
South and North Korea fought and killed a lot of each other, but they're not foreigners.