Answer:
Civil control of the military
Step-by-step explanation:
Currently, the highest military's orders for the militaria do not belong to the military's officers, It is held by the president and the congress has the power to structure the military's.
Both the presidents and the Congress can be replaced by the people through elections. So, if the people do not like how any of these people control the military's they can easily elect another candidate who want to do things according to the people's will.
This civil control is how we ensure having a strong military does not pose a threat to U.S. democracy