Call of war rescorces problem everyone faces

So let’s say: your rescorces production is low,

Your goods and food are low,

But you move some of your units from one place to another place, and guess what, you plunge into an famine

But why? , I know the units cost food, but my goods production is also bad and low, but why?

So I know units cost food, so my food is low, but my goods is low too, why? I didn’t make any new units at all.