Churlish.

Countries don't exist.

They're only an idea in the minds of human beings.

The real war is class war. A wealthy powerful minority (eg forming fascist corporation/governments or communist government/corps - they both amount to the same thing) against other wealthy powerful minorities, and against their own populations. Rulers control the populations that would otherwise kill them by focusing their attention on another ruler/population to go an kill them.

Psyop mind control.

That said, now I'm going to contradict myself and say - classes do not exist except in the minds of human beings...