noun
Refers to the governing or commanding body of a military force, often used in news or formal contexts.
軍当局は事件の調査を開始した。
The military authorities have launched an investigation into the incident.
その情報は軍当局によって発表された。
The information was released by the military authorities.
軍政 means military government or administration, focusing on governance by the military, whereas 軍当局 is a more general term for the military command or authorities.
Compound of 軍 (gun, 'military') and 当局 (tōkyoku, 'authorities'). The term is a straightforward Sino-Japanese construction.