I believe the phrase "Do as you're told" (Kkaramyeon Kka) originates from the military

‌A senior once told me that the phrase "Kkaramyeon Kka" (Do as you're told/Just do it) originates from the military,
meaning 'even if a superior tells you to crack open a chestnut with your head, you have to do it.' Is that correct?
It suddenly came to mind.
Since I served as a supplemental service worker, I only did 4 weeks of military training lol
I hit all 20 shots during training, but they said I wasn't needed in the military and sent me to supplemental service ;;