This definition appears very rarely
See other definitions of O/C
Samples in periodicals archive:
An order to the commander-in-chief, from Imam Ali to Malik-e-Ashter: Selected from Nahjol-balagha [MuhÌ£ammad ibn al-HÌ£usayn ShariÌ f al-RadÌ£iÌ ] on Amazon...
#39;Copy of Major Johnstons order to the Commander of the Estramina to haul down my [Bligh's] broad Pendant', 27 January 1807 (Series 40.097)
Draft Decision for the Politbureau of the C.C., R.C.P.(B.) on the Commander-in-Chief's Protest Concerning the Order to the Commander of the Turkestan Front
Will the government issue an order to the Commander of Army Maintenance Base to help SMRT?