The blood of the enemy, forcibly taken... because enemies are invariably linear beings with no variability who will never agree on anything, nor intentionally be difficult.
Have your dad call me if he needs this explained to him. I can do simple words, I can do legalese, I can get sesquipedalian, or I can do drill sergeant. Yep, I'm ex-military. I'm authentic. I love doing drill sergeant. Gimme some butt to chew.