
Spoken by George C. Scott in the film Patton.
Variants:
No man ever won a war by dying for his country. Wars were won by making the other poor bastard die for his.
You don't win a war by dying for your country. You win a war by making the other poor dumb bastard die for his.
War is not meant to be you dying for your country-it is by making the other bastard die for his.
Misattributed