Saigo and others kept maintaining the reform of the system of bureaucracy from 1871, the system of military, and also system of police, in February 1872, they abolished the Ministry of Hyobu and installed the Ministry of War and Ministry of the Navy, and in March the Goshimpei was abolished and installed guardee.
西郷らは明治4年（1871年）からの官制・軍制の改革および警察制度の整備を続け、5年（1872年）2月には兵部省を廃止して陸軍省・海軍省を置き、3月には御親兵を廃止して近衛兵を置いた。