noun
military register; muster roll
Official record of military personnel; used in contexts such as enlistment, discharge, or verification of service.
彼は軍籍を離れて民間人になった。
He left the military register and became a civilian.
軍籍を調べれば、その兵士の経歴がわかる。
If you check the military register, you can find out the soldier's service history.