Compost, there were 3 members of the ICC established by the 1954 Geneva conference ending the Indochina war: Canada, India, and Poland. Of the 3, only India was more or less neutral. Poland was defacto an ally of N VN (DRV) while Canada was an ally and supporter of the US and RVN. Poland was a conduit for intel to the DRV while Canada was the same for the US. The ICC - with all 3 members - was engaged throughout the Vietnam War and only dissolved by the 1973 Paris Accords.

I say again: You will not find an unbiased historian but you will find good ones who can and do discipline their biases on all sides.

JohnT