They deal only in facts, but must work for men who merchant in theories. They emerge during war because war is very much a fact. They disappear in peace because peace is mostly theory. The people who merchant in theories, and who employ logisticians in war and ignore them in peace, are generals.
Generals are a happy blessed race who radiate confidence and power.
They feed only on ambrosia and drink only nectar. In peace, they stride confidently and can invade a world simply by sweeping their hands grandly over a map, point their fingers decisively up trrain corridors, and blocking defiles and obsticles with the sides of their hands. Generals fear logisticians in war and, in peace, generals try to forget logisticians. Romping along beside generals are strategists and tacticians. Logisticians despise strategists and tacticians.