More can be written, but you might like to start with previous discussions like "Why did Luxembourg send 44 troops to the Korean War (out of some 900,000 on the U.S/U.N. side) What did they do? Did they make a difference?" by /u/Georgy_K_Zhukov and /u/CPSismyhero .

/u/Jomsviking mentions numbers in "In the Korean war Luxembourg sent 44 people over, do we know what they did and who they were?" but provided no sources.

This is not to discourage discussion. Further questions, data, and debate are always welcome.