전역이 · 전역을
discharge from military service
Example
형은 다음 달에 군대에서 전역해요.
My older brother gets discharged from the army next month.
Word parts
전 turn+역 service
Literally 'turning from service' — leaving active duty.
Good to know
Use 전역하다 for the soldier; 제대 is a near-synonym heard in everyday talk.