"...but what are PIR's?"
The PIR was the Indigenous Patrol Ration similar to the LRRP but developed for the Free World Military Forces in RVN (ARVN, ROK, THAI and our Montagnard, Meo, Khmer, Hmong, and Nung troops) with their normal diets of rice and a protein source (dried fish, ham, pieces of octopus tentacle, etc.). Y'all missed a real treat!
Richard