A military ration has to survive heat, cold, rough handling and months - or sometimes years - in storage. It must also pass a more human test: a soldier in the field needs more than just calories; good food boost morale, provides a valuable rest bite and fuels the body and sole for the things to come. Army ration packs are often treated as novelties: cardboard boxes and olive-green pouches opened for online taste tests. In reality, they are carefully engineered compromises. E