Food is of course the basis of all human civilizations, now and in the past. It is also the basis of all animal and plant civilizations, as they are. Food is the fundamental building block of all life, by necessity, and thus informs all other behaviors.
Given food's importance, it is a crucial element of all human war. Whether it is starving your opponent or feeding your own troops/people, food is the first concern of all war.
Here we see classic USA WW2 domestic propaganda. It's almost universally beautiful. And wise.