A. lack of exercise it makes the most sense
Explanation:
<u>Military installations can be defined as the locations directly operated by the military itself.</u> It is used for many purposes manifested below:
* It provides accommodation facilities to the military.
* It provides training facilities for the military.
* Military can base their equipment there in these military installations.
* Military can conduct their operations secretly from these installation.
* They are also used to store food for the military.
* Some military installation are also used for aviation purposes and known as air bases.
* Military installation when used for military ships are known as naval bases.
During the Vietnam war, the country is separated hawks and doves. It is because we couldn't defend against Vietnam.