Leela: When you were planning this peace ring, didn't you realize spaceships can move in three dimensions?
Free Waterfall, Sr.: No, I did not.
—
Futurama, "The Bird-Bot of Ice-Catraz"
In space battles, as opposed to ground battles, the attacks could come from any position: above, below, behind, or sideways. So many commanders
forgot that after years out of a fighter pilot's chair.
